New Construction / UK /

V6

Information correct as of 27thJune 2025. Please see kb.breeam.com for the latest compliance information.

Acceptable deviations – ISO 7730:2005 category B - KBCN1714

Acceptable deviations from the ISO 7730:2005 category B criteria thermal modelling criteria can be made in accordance with CEN 16798-2:2019 Annex E. Up to a 6 % deviation based on yearly occupied hours can be accepted when demonstrating compliance.

Accreditation – sampling and testing laboratories - KBCN1337

Accreditation of organisations performing laboratory analysis and testing of emissions: NC 2016 or newer All organisations conducting indoor air analysis or emissions testing of building products must be accredited to ISO/IEC 17025, with specific accreditation covering all applicable chemical analysis and emission testing methods relevant to their scope. The accreditation must be carried out: either Accreditation of organisations performing sampling: If sampling and analysis is carried out by two separate organisations, then sampling organisation does not need to be accredited to the above. However, they must provide a brief report justifying: This report is provided to the BREEAM assessor and submitted as supporting evidence for this issue 
06-May-2025 Comprehensively updated to clarify the requirements.
31-Oct-2022 Wording clarified. Scheme applicability updated.
10-Oct-2022 Title amended for clarity. Scheme applicability updated.
24-May-2022 Updated to differentiate between sampling and analysis requirements. 
07-May-2021 Added clarification regarding alternative qualifications. 
10-May-2021 Updated scheme applicability.

Accredited energy assessors – directories - KBCN1465

The directory of accredited energy assessors has moved. For England, Wales and Northern Ireland, accredited energy assessors can be found here: https://getting-new-energy-certificate.digital.communities.gov.uk/ For Scotland, accredited energy assessors can be found here: https://www.scottishepcregister.org.uk This will be updated in future manual re-issues. 
24 Aug 2022 - Applicability to UKNC V6 confirmed

Achieving a reduction in noise levels where background levels are low - KBCN1692

Where existing background levels are low, such as during night-time, there is no dispensation or flexibility that can be applied in achieving the requirements.  The aim of the issue is to reduce the potential impact of noise from the assessed building to local noise-sensitive buildings.  Acoustic experts have confirmed that the requirements for the background noise levels are still appropriate where existing levels are low, including where a 5dB reduction is stated within the criteria.

Adaptability for a projected climate change scenario – Winter conditions - KBCN1715

Where future climate change scenario projections in winter indicates a higher temperature and, therefore, more thermally comfortable climate compared to the current winter temperatures, it can be assumed that the winter conditions within the climate change scenario are met based on the thermal modelling of current winter conditions. Justification must be provided for each project confirming that the future winter conditions will be met with the current heating system. In a warming climate the heating system needs to be sized for the beginning of its lifespan, whereas the cooling systems need to be sized for the end of their life span (Ref: CIBSE TM55: 2014)

Amenities – Pharmacy within a hospital or health centre - KBCN0321

To meet the requirements of 'Over the counter services associated with a pharmacy', a dispensary within a health centre or hospital can be considered as meeting the intent, provided it is publicly accessible and also offers the type of over-the-counter services associated with a stand-alone pharmacy, such as non-prescription medication and health products. Note: This is a change to the approach outlined in the previous KBCN wording, therefore, for assessments registered before this update, where it can be demonstrated that the the assessor has advised the project team based on the previous wording, this can be accepted: Superseded guidance: A publicly accessible pharmacy would typically be required in order to constitute a suitable amenity. If it can be confirmed that an internal pharmacy (in Northern Ireland this may also include an onsite controlled medical dispensary) will provide prescribed medicines for building users, this is acceptable. 
18 June 2025 - Title updated and wording amended to clarify the intent. Applied to NC V6 standards.

Applicability – industrial operational areas - KBCN1342

The aim of this issue is to encourage a healthy internal environment.  For the operational areas of industrial buildings, the internal environment is dictated by health and safety requirements.  This means that the BREEAM requirements should not be made applicable to them, and so the operational areas can be ignored in the assessment of Hea 02. 
10-Oct-2022 - Title amended for clarity and consistency. Scheme applicability updated.

Applying the requirements to shell only + shell and core assessments - KBCN00075

A Suitably Qualified Acoustician (SQA) must carry out a quantifiable assessment of the specification of the built form, construction and any external factors that are likely to affect the indoor ambient noise levels. From this assessment, the SQA must confirm that the developer’s scope of works will enable a future tenant utilising a typical fit-out and specification to meet the levels required to demonstrate compliance with the BREEAM criteria. Where the specific room functions and areas within the building are yet to be defined, the acoustician’s assessment should demonstrate that the criteria for the most sensitive room type likely to be present in the building is capable of being achieved. Where the typical fit out would include a range of requirements (e.g. offices with a mix of open plan, cellular offices, meeting rooms and breakout areas; or retail with sales floor, stock/storage, office and staff rest areas), the acoustician should make an assessment based on a speculative layout and outline specification to determine whether the requirements of the relevant best practice standard are achievable and include examples of the most sensitive room types. Where the majority of a building’s floor plan will require high performance acoustic environments (e.g. classroom/seminar buildings), then the BREEAM requirements must be achieved for the entire shell where specific layouts are not determined by the built form. Post-construction testing is not required subject to confirmation from the project team that the built form, construction and any external factors have not changed from those used in the SQA's assessment. 
14-Feb-2024 - Scheme applicability updated. Clarified applicability to shell only assessments. Title updated.
09-Aug-2019 - Updated applicability to UK NC 2018
08-Dec-2017 - Clarification added regarding post-construction evidence.
   

Approach to thermal model when using BMS - KBCN0169

Where there are smart systems such as BMS in place, modelling must consider normal operating conditions, with the heating and cooling system in operation regardless of the control strategy. In order for the design team to size the heating/cooling plant, they will carry out modelling to calculate the heat/cold loss throughout the year. Results of these calculations must be submitted, with the heating/cooling plant specification which would demonstrate that the building has been designed to ensure internal winter/summer temperatures will not drop below an acceptable level, and that in effect the winter TOR is zero. 
14 Apr 2023 Applicability to UK NC2018 and UK/Int V6 confirmed

Assessing industrial spaces – exemptions - KBCN0734

The thermal comfort criteria do not apply to the operational or storage areas typically found in industrial assets or other similar asset types. The criteria is still be applied to the other parts of the asset as appropriate. Operational and storage areas often have function-related thermal requirements determined by operational or storage needs. These functional requirements override the needs of any occupants. 
17-Jan-2024 - Scheme applicability updated.
03-Nov-2020 - Issue 2.0 of UK RFO technical manual updated with new CN detailing the above.

Assessing thermal comfort – Residential buildings - KBCN1408

CIBSE TM59 can be used to demonstrate compliance with the thermal comfort requirements for residential and multi-residential buildings (long-term stay), instead of ISO 7730:2005. This is to recognise the most up to date methodology relating to the assessment of homes 
26 Jan 2025 - Updated to apply to multi-residential buildings (long-term stay) and scheme applicability extended to account for this.

Asset classification – co-living developments - KBCN1568

The following is a guide only. Every co-living project will combine a varying mix of residential with managed spaces, and assessors must in all cases review the suitability of the criteria to determine the most appropriate asset classification. Co-living features Co-living developments generally combine: Classification Using building regulation classifications as a guide As a guide, assessors can also consider how their asset is classified according to local regulations. For UK NC assets, KBCN1225 provides additional clarification:

BRUKL File Upload – HVAC Area Mismatch in UK New Construction V6.1 - KBCN1734

To support quality and accuracy in Ene 01 credit calculations, an additional check has been introduced for UK New Construction V6.1 only. This checks that, in the BRUKL file, the total building area equals the sum of HVAC system areas (notional and actual) and if not, it generates an error message during the upload. These area values are used to calculate the adjusted notional value for Ene 01. We are aware that some approved third-party software (e.g. IES, TAS) may be generating files with floor area discrepancies, even if the energy model is correct. If this affects you: For additional information, please reach out to [email protected] 
06 Jun 2025 - Title and wording updated to clarify the intent and scope of the guidance
 

Building LCA – Scope when a BREEAM Assessment covers only part of the new building design - KBCN1172

To give reliable results, building LCA must capture the interactions that occur across an entire design (the system). A design decision in one part of the design will, in many cases, cause knock-on effects to other parts of the design. If only part of a building being designed is included in the building LCA the designer may choose a design option that optimises environmental impacts for the limited part analysed, but will be unaware of potential detrimental effects to the overall environmental impact of the building. In addition, if a building LCA only includes the construction products that form the BREEAM assessment area, inconsistencies arise with regards to construction products that serve all areas of the building in common. For example, an assessment on a central floor that excludes the roof, compared with an assessment on the (otherwise identical) top floor that does include the roof. This approach would be unfair. Therefore, the building LCA scope should normally include the whole building design (as defined in Mat 01, ‘Scope of assessment’) even if the area covered by the BREEAM assessment scope is only part of the building. However, where in the opinion of the BREEAM Assessor this is not reasonable, it is acceptable for the building LCA scope to match the BREEAM assessment scope. Examples where this may be the case include newly-constructed, mixed-use buildings (where the different use zones are assessed under different schemes or some are not being assessed at all) and part new-build part refurbishment projects. Where this is the case:-

Within or forming the boundary of the BREEAM assessment scope. Predominantly the responsibility of the project team undertaking the building LCA work.

Note: Based on the above conditions, if no construction elements/components are included, or what is included is too limited to have significantly different options to appraise, then credits cannot be awarded.

Select ‘Other’ for the ‘BREEAM assessment building use type’ (note: ‘mixed-use’ should only be entered for mixed-use buildings where the whole building is included in the building LCA scope). For ‘Functional quantity…’, enter the value corresponding to the scope included in the building LCA. Include the following text in cell C10 of the ‘DifferencesID2,3,4’ sheet: “The scope of this building LCA work matches the BREEAM assessment scope, which covers only part of a building being newly constructed/refurbished. Of the areas being newly constructed/refurbished, the building use type(s) of the areas included in the building LCA scope are [insert use type(s)] and the building use type(s) of the areas excluded are [insert use type(s)]. The Functional quantity of the areas excluded are [insert value]”.

06-Mar-2024 - Scheme applicability updated to UK NC V6.
01-Dec-2020 - Clarification to previous update added.
27-Nov-2020 - Exceptions paragraph added.
06-Dec-2019 - Scope of KBCN clarified.

Building LCA – similar buildings approach - KBCN1459

If multiple buildings share an identical design, as per KBCN1226, the one set of LCA evidence can be submitted for (where pursued) the superstructure and core buildings services criteria for each identical building. Where buildings are similar, but not identical the following applies. Level of variation Tool submission Separate submissions are carried out in BREEAM Projects: Evidence submission Separate and specific building LCA evidence for each building must be submitted for (where pursued): For options appraisals, common evidence covering all similar buildings can be used. There is no requirement for different design options for each building, although this can still be done if this brings value to the project. 
04-Oct-2023 - Title and layout updated for clarity and consistency. Scheme applicability updated.
16-Nov-2021 - Revised and re-published.

Building LCA – evidence requirements for multiple assessments with identical designs - KBCN1226

Superstructure + core building services Where an identical superstructure design and / or identical core building services design is used for multiple buildings, the same building LCA evidence may be submitted for all these assessments. The following shall be identical: Substructure and hard landscaping It is unlikely that the same substructure and hard landscaping design will apply to more than one building due to variations in ground conditions and site layout. Therefore, it is not acceptable for the same substructure / hard landscaping LCA evidence to be submitted for this criteria for more than one assessment. Similar buildings approach If the LCA(s) are part of a similar buildings assessment, please also see KBCN1459. 
04-Oct-2023 - Link to KBCN1459 added. Scheme applicability updated. KBCN layout adjusted for clarity.
 

Building LCA – no significantly different superstructure options - KBCN1672

Mat 01 requires multiple significantly different superstructure options at both concept and technical design stage. Sometimes due to project, cost, or client requirements it is not possible to produce viable options that are significantly different. In these cases, multiple options are still required in line with the criteria but are not required to meet the definition of significantly different as defined in the methodology. Regardless of this, design teams must aim to provide meaningfully different design or specification options that still offer viable alternative outcomes for the project, its life cycle impact, and life cycle costing (where this credit is targeted). Any restrictions which limit the possible options must be justified for the QA submission.

Calculating EPR where there are multiple BRUKL/NCM outputs - KBCN1618

Where more than one NCM output is produced for a development that is registered as a single assessment, an area-weighted average must be used to calculate the number of credits to be awarded. This does not apply where the ‘similar buildings’ approach is used. Projects in England assessed under UKNC V6.0 should submit their BRUKL files to BREEAM and we will calculate the result. Projects assessed under UKNC V6.1 can upload multiple BRUKL.inp files for a single assessment and the platform will perform the calculation.   For projects assessed under BREEAM UK NC2018 and International NC 2013, 2016 and V6, please refer to KBCN1083

Centralised air handling units (AHU) - KBCN0941

The requirements of the: do not apply to centralised AHUs, where it is not technically feasible to sub-meter energy use by separate functional, tenanted or floor areas. The credit(s) will be assessed based on the remaining applicable energy uses. 
06-Mar-2024 - Scheme applicability extended to V6.

Changes to CCS – January 2022 - KBCN1500

UKNC2011, UKNC2014, RFO2014 and Domestic Refurbishment 2014 schemes: In response to the 2022 changes to the structure and scoring in the CCS, the adjusted points for credits are as follows for each of the three new sections (Community, Environment, and Workforce): One credit requires a minimum of 9 points per section and 27 overall. Two credits require a minimum of 11 points per section and 35 overall. Exemplary credit requires a minimum of 13 points per section and 39 overall. UKNC2018, UKNCV6 and HQM ONE schemes: No changes have been made to the criteria or the requirement to demonstrate compliance with items g, p and q for the exemplary credit. GN33 has been updated to demonstrate the mapping of the updated CCS to these schemes, see KBCN1215. For assessments not following CSS, the criteria remain unchanged. More information on the changes to the CCS scheme are outlined on the CCS website. 
12-Apr-2023 - Updated to clarify the applicability of the new guidance.
28-Feb-2023 - Note updated to refer to the updated version of GN33.
29-Apr-2022 - Note added to clarify that this information supersedes the requirements in the technical manuals.
25-Mar-2022 - Updated to provide the new scoring requirements for BREEAM standards.

Combined sub-metering – electric space / water heating and small power - KBCN00068

For bedrooms and associated spaces in: It is acceptable for an electric space or water heating system to be combined with lighting and small power, provided that sub-metering is provided for each floor plate or other appropriate sub-division. For these asset types, sub-metering electric heating in multiple bedrooms may be costly and technically challenging. Where occupants have individual control but are not responsible for paying the utility bills, the building manager may have little influence on their energy consumption. Therefore, sub-metering electric heating would provide little or no benefit in meeting the aim of the issue. 
06-Mar-2024 - Scheme applicability extended to V6. 
15-Dec-2023 - Title updated to clarify that this approach can be applied to both space heating and domestic hot water heating, where appropriate.

Compactor/baler/organic waste storage requirements – Speculative/Shell only/Shell and core - KBCN1662

For Shell only/Shell and core assessments and speculative developments, where the scope of works does not include the installation of such facilities but the building function suggests that they will be required, appropriately sized space, services and infrastructure for the relevant facilities must be provided. The facilities themselves do not necessarily need to be provided or installed to demonstrate compliance. 
01 Oct 2024 - Title and wording updated to clarify that this approach can be applied for shell only and shell and core, as well as speculative projects. Applied to International NC.

Control of glare from sunlight – use of EN 14501 to demonstrate compliance for blinds - KBCN1737

Where glare control criteria for blinds sets an openness factor of ≤ 1% and total light transmission of ≤ 10%, this is classified as class 3 within EN 14501:2021. In accordance with Table 7 of EN 14501 alternative class 3 and 4 solar protection devices can be used to demonstrate compliance, as they meet or exceed the current criteria.

Cyclists’ facilities – Shell only/shell & core assessments - KBCN0882

Cycle parking must be provided as part of the base-build for all assessment types. Where compliance is sought for additional cyclists’ facilities, the developer should provide all aspects of the installation which fall within the scope of their work and facilitate the future completion of any aspects which do not. For shell & core assessments, if additional facilities, such as showers and drying space, are not provided in core areas and internal walls are not provided to tenanted areas, these must be indicated on design drawings and all relevant services provided. This would include capped-off supplies and electrical points as necessary in order to facilitate the completion of the compliant facilities by the tenant. Where internal walls are within scope, a compliant changing area must be provided, however for lockers, compliance can be achieved by providing a design drawing showing that there is an adequately sized and suitably located space for the required number of compliant lockers. The developer should do as much as they can, within the scope of their work, to facilitate the future installation of compliant facilities and should not do anything which would make future installation more onerous. 
01 Oct 2024 - Addition paragraph added to clarify the approach for changing areas and lockers.
25 May 2018 - Wording amended to clarify the intent.

Daylighting – alternative requirements for schools. - KBCN1272

For schools, it is acceptable to use the Department for Education Generic Design Brief (GDB), Technical Annex 2E requirements as an alternative method of compliance with the ‘Daylighting’ criteria. The set daylight performance criteria by each area type (weighted by area) must be met in line with the GDB framework requirements. 
05-Aug-2024 Completely updated to align with current DfE requirements, and V7 criteria. Title updated.
31-Jul-2019 Reworded to clarify that the 80% requirement (relating to old EFSA requirements) still applies.

Designed-out or integrated finishes - KBCN1066

The requirements for this credit are met when either: This issue recognises avoiding unnecessary waste of materials. 
16-May-2023 - Merged with KBCN0046. Scheme applicability updated. Name updated for clarity.
 

District cooling – Used in combination with local cooling - KBCN1634

Where district cooling can be considered outside the scope of the assessment, either in accordance with the Methodology section of the technical manual or in line with KBCN0759, compliance must be based on calculating the DELC for all systems. However, where the district cooling system is exempt from assessment, as described above, this should be based on a GWP of zero for the district cooling system.

Ecology dependency diagrams - KBCN1456

These dependency diagrams show how ecology prerequisites and credits interact across issues in the ecology category. UK New Construction UK NC ecology dependencies rev 0.0 Applies to: Home Quality Mark HQM V6 ecology dependencies rev 0.0 Applies to: 
30-Aug-2023 - HQM ecology dependency diagram added. Title and scheme applicability updated.

Electric vehicle charging stations – Short-term visitor spaces - KBCN1735

Where it can be demonstrated that parking spaces for visitors will only be used for short-term parking (a maximum of 15 minutes), these spaces can be excluded from the calculation for EV spaces. This exclusion will typically apply to certain types of retail outlet, where visitors are, for example, collecting or dropping off orders. However, other situations can be considered, where justified.

Emissions from products – Building materials for M&E purposes - KBCN1740

All M&E materials are excluded from VOC assessment requirements. However, from V7 onward, while finished M&E products may be excluded, all on-site applications of paints, coatings, adhesives, sealants, and duct insulation used for M&E purposes must be included in VOC assessments under their relevant material categories.

Emissions from products – earlier versions of AgBB standard - KBCN0655

Guidance Note GN22 lists the standard AgBB (2015) as a recognised scheme for emissions from building products for pre-December 2015 launched BREEAM schemes. Previous versions of the AgBB scheme are not listed as recognised schemes because earlier versions of AgBB did not include any requirement for the testing of Formaldehyde. If an earlier version AgBB has been used, further evidence will be required to provide additional information on the required Formaldehyde testing. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Emissions from products – EU CLP Regulation and Category 1A/B carcinogen emission limits - KBCN1280

The European Regulation (EC) No.1272/2008 on classification, labelling and packaging of substances and mixtures (‘the CLP Regulation’ or ‘CLP’) applies to all EU Member States. CLP requires manufacturers, importers, downstream users and distributors to communicate the identified hazards of a substance or mixture to the other parties in the supply chain, including to consumers. The regulation requires products with hazardous properties to be labelled in accordance with CLP before being placed on the market. CLP requires products containing any ingredients that have been classified as Category 1A and 1B carcinogens to be labelled as carcinogenic. Therefore, with respect to the BREEAM Category 1A and 1B carcinogens emission limit criteria, for products marketed in EU Member States, if a product’s safety information (e.g. safety data sheet) or a manufacturer’s declaration confirms that that the product does not need to be labelled as a Category 1A or 1B carcinogen in accordance with CLP, then this information would be an acceptable form of evidence for demonstrating compliance with the criteria. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Emissions from products – Guidance Note 22 (GN22) - KBCN0719

Latest version: v3.0, January 2025 Within the Health and Wellbeing category of several BREEAM schemes, credits are awarded for specifying materials that minimise emissions from building products of formaldehyde and volatile organic compounds (VOCs). The criteria involve meeting emission level performance requirements in accordance with compliant performance and testing standards. Guidance Note 22 (GN22) lists schemes that show equivalent or better performance than the current BREEAM and HQM criteria, and therefore can be used to demonstrate compliance with the criteria. This document should be read in conjunction with the relevant assessment issue guidance provided in the appropriate BREEAM or HQM technical manual. The guidance note contains two tables: Download Guidance Note 22 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
30-Jan-2025 - Updated for release of GN22 3.0
30-Sep-2024 - Updated for release of GN22 2.9
01-Feb-2024 - Updated for release of GN22 2.8
31-Jan-2023 - Updated for release of GN22 2.7
10-Oct-2022 - This KBCN merged with KBCN0646. Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.
25-Jan-2019 - Link to Guidance Note updated
12-Mar-2018 - Link to Guidance Note updated

Emissions from products – installations manufactured off-site - KBCN0137

Internal finishes to installations manufactured off-site such as elevators need to be assessed for the emissions from products criteria. The specification of internal finishes (regardless of whether they are installed on site or in the factory) will impact on VOC emissions. By specifying low VOC finishes, design teams will be encouraging manufacturers to consider the environmental impacts of their products. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.
 

Emissions from products – manufacturers’ calculations for paints and varnishes - KBCN0452

Manufacturers' calculations of VOC content, based on the constituent ingredients, can be used to demonstrate compliance with the testing requirement for paints and varnishes.

10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Scheme applicability updated.

Emissions from products – paints and varnishes – historic buildings - KBCN1041

Scope This KBCN covers the use of paints and varnishes for the 'emissions from products' criteria. These are paints that: These paints may be used in new extensions to historic buildings (this KBCN is a manual compliance note in RFO 2014). Exemptions for use The use of such paints is allowable if: Localisation National conservation bodies and accepted grade listings applicable to this KBCN are: Remedial actions In all cases, procedures are in place to flush the building out for a sufficient period before occupation. This is to reduce the risks associated with VOCs in accordance with the criteria. 
11-Oct-2022 KBCN restructured for clarity. Title amended for clarity. National conservation body for NI updated. Scheme applicability updated.

Emissions from products – scope of assessment - KBCN0212

General This issue covers any product installed or applied inside the inner surface of the building’s infiltration, vapour or waterproof membrane. Where this membrane is not present, it applies to the inside of the building envelope’s interior-facing thermal insulation layer. Only products that are installed or applied in parts of the building where their emissions are likely to affect indoor air quality need to be assessed. Paints and coatings Any decorative paints and varnishes that occupants are exposed to should be assessed. This is likely to include paints and coatings applied to walls, ceilings, floors, doors, etc. Whole products A finish applied to a product in the factory is assessed as a whole product, and not separately as a paint or coating. For instance, a wood panel has a finish applied in the factory. The whole panel, including all the elements that make up that panel, would need to comply with the requirements set for wood panel products in this issue. The finished product as a whole must meet the performance requirements / emission limits set in the manual. 
11-Oct-2022 - Title amended for clarity and consistency. Content merged with KBCN0871.
10-Oct-2022 - Wording simplified. Scheme applicability updated.
16-Jun-2017 - Title and general principle amended to extend the applicability of the KBCN to all finishes. Paints specified for specialist applications covered in KBCN0872.
 

Emissions from products – specialist paints and coatings - KBCN0872

Where a paint or coating falls within: then the paint or coating must be assessed. Specialist paints and coatings are exempted from meeting the emission limits where there are no alternative products available that can perform the function, and still meet the emission limits. This must be clearly evidenced. 
27-Oct-2022 Wording clarified. New compliance principle added from UKNC V6.
10-Oct-2022 Title amended for clarity. Scheme applicability updated.
13-Mar-2020 KBCN amended to clarify exceptions and applicability.
16-Jun-2017 Content merged with KBCN0212.

Emissions from products – testing to ISO 16000-10 - KBCN1134

Results of testing to ISO 16000-10 can be considered compliant with the relevant testing requirements of the emissions from construction products credit where the product manufacturer can demonstrate the results generated by testing to ISO 16000-10 correlate to results that would be achieved using EN 16516 or ISO 16000-9. This is because EN 16516 classifies ISO 16000-10 as an ‘indirect method’, which means “any simplified, screening, secondary, derived or alternative method. An indirect method can be applied if it provides a result that is comparable to or that correlates with the result of the reference method under the conditions applied. The validity of the correlation with the reference method is limited to the field of application for which it has been established.” 
11-Oct-2022 - Title amended for clarity and consistency. Scheme applicability updated.

Energy consumption and carbon emissions of untreated spaces - KBCN00049

Where the assessment contains a mix of treated and untreated spaces, untreated spaces can be excluded and the performance based on the treated spaces only. Where the entire assessment is untreated, the whole of the structure(s) must be assessed on the basis that this issue is critical for certification. BREEAM is primarily designed to assess permanent, treated and occupied structures. Untreated structures are unlikely to gain many credits when being assessed. 
24/08/2022 - Applicability to UKNC V6 confirmed

Energy modelling not required for Building Regulations compliance - KBCN0487

For the purposes of demonstrating BREEAM compliance, it is still necessary to undertake energy modelling to generate the required performance data. 
24/08/2022 Applicability to UKNC V6 confirmed
 

Energy performance assessment for part of a whole building - KBCN0596

If the assessment is only covering part of a whole building, the energy performance assessment must be representative of the part of the building being assessed. Simply taking the energy performance assessment of the whole building would not therefore comply, especially if the non-assessed parts of the building were of a different use. A separate energy assessment of the part of the building is likely to be required. The energy performance assessment must be representative of the parts of the building being assessed. This also applies to the predicted energy performance and all energy modelling for the prediction of operation energy consumption.  
24/08/2022 - Applicability to UKNC V6 confirmed
Amended 01/09/2020 to cover UKNC2018 - Prediction of operational energy consumption

Erratum – 2018 to V6 – scope – external doors - KBCN1651

The scope of this issue includes external doors. Currently, external doors are missing from the Mat 03 scope 'internal finishes'. This will be corrected in future versions.

Escalators or moving walks – variable speed drive - KBCN1621

The requirements refer to 'a load sensing device that synchronises motor output to passenger demand through a variable speed drive'. The intent is that the inverter must operate full-time to moderate output based on passenger demand.

Evidence – Photographs not permitted for security reasons - KBCN0389

Where photographs are not permitted during a site visit for security reasons, in addition to any alternative evidence requirements listed in the Schedule of Evidence for each issue, the assessor will also need to provide a detailed site inspection report and/or as-built drawings (where permitted by the client). If following this approach, full justification and documentary evidence from the client will be required for QA purposes.

Evidence requirements – responsible sourcing of materials at post-construction - KBCN1599

Whilst the UK BREEAM manuals are less prescriptive in the evidential requirements to allow flexibility, to ensure consistency across the schemes, it is expected that robust evidence should be provided to verify the source of any certified materials and how the assessor has confirmed the products and manufacturers used. Evidence supplied at post construction stage must reflect the completed building and confirm the responsibly sourced materials that have been procured and installed on the project. Supporting documentation is required to validate letters of confirmation or schedules of materials. Evidence provided could include proof of purchase, for example, invoices, delivery tickets, purchase orders or correspondence from suppliers. This may be an example for each material sourced, rather than every delivery ticket for instance.  Alternatively, evidence of the use of the responsibly sourced materials may include as-built drawings, O&M documentation or site photographs.

Excluding large untreated warehouse spaces from ‘Useful floor area’ - KBCN00069

For industrial buildings, where there are offices and the untreated warehouse space does not include any energy-intensive systems or processes, the warehouse space can be excluded from the calculation of 'useful floor area' to determine whether Criterion 2 or 3 (Criterion 2 only in UK New Construction 2018) is applicable. For speculative developments, if Planning Consent includes Distribution or Warehousing (UK Planning Use Class B8 or equivalent local planning consent) and the design team and assessor can justify that this is the intended use, the above approach can be followed for untreated warehouse space. Where there is minimal energy consumption, complex sub-metering such a space would add little benefit.  
28 Oct 2022 - Applicability to INC V6 and UK NC V6 confirmed.
Wording clarified and note added relating to speculative developments - 16/12/2016
Wording clarified relating to speculative developments - 06/01/2020

Exemplary credit – Ene 01 credits required - KBCN1556

For the exemplary credit, the requirement for 'Ene 01 Reduction of energy use and carbon emissions' is to achieve four credits, (rather than the eight stated in the manual). This is due to the altered credit scale in NC V6 Ene 01. This will be updated in the next reissue of the technical manual

Exemplary level criteria – not all product categories specified - KBCN0636

The assessment of exemplary level criteria assumes that every product category is specified. It awards credit(s) based on the number of product categories that meet the exemplary levels. Where the assessment does not contain every product category, all product categories must meet the exemplary level requirements. [accordion] [accordion_block title="1 exemplary credit"] Exemplary credit requirement:  3 out of 4 product types meet the exemplary requirements. An assessment has only specified 3 product types in total. To achieve the credit, all product types must meet the exemplary criteria. [/accordion_block] [accordion_block title="2 exemplary credits"] Exemplary credit requirement: An assessment has only specified 3 product types in total. [/accordion_block] [/accordion] 
19-Oct-2022 - Wording and title clarified. Scheme applicability updated. Scenario added.

Fire hydrants and sprinklers – Leak detection - KBCN0680

Where it is confirmed by an appropriate project team member that it is not possible to fully meet the leak detection criteria for fire hydrants or sprinklers, an alternative approach can be implemented for these systems. This must demonstrably meet the aim of the issue by detecting and alerting the building management to major water leaks.   Previous guidance - superseded on 30 May 2024 To meet BREEAM compliance, emergency systems such as fire hydrants and sprinklers need also to be covered by a leak detection system. The leak detection system must cover all mains water supply between and within the building and the ‘site boundary'. 
11 Sep 2024 - Applicability to BIU V6 confirmed - QN-75509-C8H8V1
30 May 2024 - New guidance introduced to clarify that BREEAM compliance should not compromise the operation of building safety-critical systems. Applicability to NC V6 standards confirmed.

Fit-out level – Selecting the appropriate assessment type - KBCN1627

Projects designed and constructed as fully fitted should not be evaluated as ‘Shell and core’ or ‘Shell-only’ where the intent is to limit the scope of the BREEAM assessment without further justification. Where the fit-out level of a project is not consistent, the BREEAM assessment type should be considered in line with KBCN0702

Fleet operator definition – Responsible construction management items p and q - KBCN1473

The definition of the fleet operator states that “transportation to the project is likely to be by several fleet operators many of which will not be under the control of the constructor. The criteria relate to all fleet operators, nonetheless.” Following feedback on the difficulties of applying the requirements to fleet operators who do not directly work with the contractor, these requirements will only apply to those who are under the control of the principal contractor. ‘Fleet operators’ should now, therefore, be read as ‘all vehicles used or present on site which are owned, leased or hired by the principal contractor’. For clarity this may include, but is not limited to: Item P should, therefore, read: For any company vehicles or plant owned, leased or hired by the principal contractor; driver or operator training and awareness is undertaken to promote safety within the development footprint and off-site. Item Q should read: The principal contractor records, investigates and analyses any vehicular accidents, incidents and near misses; and learnings are incorporated in updated policies and training. This will be amended in the next reissue of the technical manual and GN33. 
26 September 2024: This has been updated to provide additional clarification on what is meant by fleet operators under the control of the principal contractor.
20 January 2025: Reference to HQM added.
 

Flow control devices – Use of devices on individual sanitary fittings - KBCN1550

The intent of the requirement for flow control devices is to minimise the impact of undetected wastage and leaks from sanitary fittings and supply pipework. The use of flow control devices on individual sanitary fittings alone does not, therefore, fully meet this aim.

Flow control devices – Prison cells - KBCN1709

Flow control devices in WC areas or facilities are not required in residential areas of long-term residential accommodation. This can be applied to prison cells with ensuite facilities on the basis that they are long-term residential accommodation. It does not apply to holding cells, other short-term accommodation, staff areas or other non-residential areas of a cell block.

FSC and PEFC Mixed Sources certified timber - KBCN00091

Products labelled: Meet the BREEAM responsible sourcing requirements. This means any such products: Products carrying the FSC Mix label contain at least 70% FSC certified and recycled material. These products may contain a small proportion of FSC Controlled Wood (KBCN00054). However for BREEAM compliance, the FSC Mix label is sufficient to meet our requirements. 
14-Mar-2024 - Wording clarified and expanded. Relevant prerequisites and requirements clarified. Scheme applicability updated.

FSC Controlled Wood - KBCN00054

The FSC Controlled Wood label minimises the risk that wood comes from illegal or controversial sources, however it does not eliminate this risk. Therefore, products which are: Do not meet the BREEAM definition of responsibly sourced. Where FSC Mix labelled products contain FSC Controlled Wood, see KBCN00091. This means that any such products: 
14-Mar-2024 - Wording clarified and expanded. Relevant prerequisites and requirements clarified. Scheme applicability updated.

GN39 Ene 01 Calculation Methodology – BREEAM UK NC 2018, V6.0, and V6.1 - KBCN1098

Latest version: v3.0, June 2023 Guidance Note 39 describes the calculation methodology for the energy performance criteria (up to 9 credits) in Ene 01 for BREEAM UK New Construction 2018, Version 6.0, and Version 6.1. Download Guidance Note 39 View all Guidance Notes on BREEAM Projects (licensed assessors only) 
14-Jun-2023 - Updated for release of UK NC V6.1

Guidance Notes – Applicability to BREEAM UK NC V6 - KBCN1534

Some Guidance Notes that apply to BREEAM UK New Construction 2018 (UK NC 2018) remain fully or partly applicable to assessments using BREEAM UK New Construction Version 6 (UK NC V6): Fully applicable Partly applicable Not applicable 
31-Jan-2023 - Updated link for GN38

ILP Guidance Note 1 updated - KBCN1385

Pol 04 references the ILP Guidance notes for the reduction of obtrusive light 2011. This has now been updated to the ILP Guidance note 1 for the reduction of obtrusive light 2021. This is available for free from the ILP website. Requirements Table 2 of the guidance note classifies different lighting environments into Zones E0 to E4. Use this table to define which sets of requirements apply to the assessment. Tables 3-8 of the guidance note define the requirements for criterion 2. For cut-off type luminaires which (by design) block out light in obstructive directions, calculations are not required for meeting requirements relating to: This update will be reflected in the future revisions of the relevant manuals. 
02-Nov-2021 Applicability to all UK BREEAM schemes confirmed.
27-Sep-2023 Updated for ILP Guidance Note 1 2021. Requirements clarified. Scheme applicability updated.

Independent Air Testing Scheme (IATS) – Elmhurst Airtightness Scheme (EAS) - KBCN1699

Please note that the Independent Air Testing Scheme (IATS) has been rebranded as the Elmhurst Airtightness Scheme (EAS) and therefore where referenced, this may also be accepted.

Indoor air quality plan – Guidance Note 6 - KBCN0618

Latest version: v2.1 August 2022 Guidance Note 6 provides guidance to assessors and project teams regarding the content and rigour of an Indoor Air Quality Plan (IAQP) as required by the Hea 02 Indoor air quality criteria in the BREEAM New Construction and Refurbishment schemes. It should not be interpreted as BREEAM criteria. It is intended to provide assessors and project teams with further, flexible information and guidance regarding the rigour, content and tasks of an IAQP. Download Guidance Note 6 (licensed assessors only) View all Guidance Notes (licensed assessors only) 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency.

Indoor air quality plan – later consideration - KBCN1544

Where BREEAM has been engaged at a later stage in the project (for instance, at the beginning of a Post-Construction Assessment) the IAQ plan must still be produced. The late stage plan must clearly identify opportunities to improve indoor air quality that: The plan is focused on decisions and actions that can still be practically carried out. The indoor air quality plan is an on-going consideration that extends into the operational life of the asset.

Indoor air quality plan – pre-requisite – no link to later performance - KBCN1541

The indoor air quality plan is a pre-requisite to achieving other credits in Hea 02. However, achieving the pre-requisite does not depend on achieving the other credits in the issue: The pre-requisite requirement is only for a compliant indoor air quality plan to be written. 
17-Nov-2022 Wording clarified.

Indoor air quality plan – scope - KBCN0294

Where possible, the indoor air quality plan must cover all items in the criteria. This means the plan must be completed for: Within these requirements, there is flexibility for the design team to use their professional judgement to determine what is appropriate to meet the criteria. Any exclusions must be clearly evidenced and justified. As the basis for effective asset management, the indoor air quality plan must be written in a consistent and comprehensive manner. The report must address relevant aspects as fully as possible within the scope of the development. 
11-Oct-2022 Title updated for clarity. Wording clarified. Content merged with KBCN0556. Reference to KBCN1544 added. Scheme applicability updated.

Knowledge Base – Applicability of UK NC 2018 KBCNs to UK NC V6 - KBCN1531

The assessment issues and criteria in BREEAM UK NC V6 are the same as BREEAM UK NC 2018 except for specific changes in: The changes in Hea 02 do not affect the applicability of any current UK NC 2018 KBCNs All UK NC 2018 KBCNs for assessment issues other than Ene 01 are, therefore, applicable to UK NC V6. For Ene 01 we have reviewed and, where necessary, amended relevant KBCNs for UK NC V6. We are also taking the opportunity to update some of these for UK NC 2018.   Please also refer to the summary of changes for NC V6, provided in KBCN1530. 
26/08/2022 Updated following review, to clarify that all current NC2018 Hea 02 KBCNs are applicable to UK NC V6.

LCC – Competent person - KBCN1582

The technical manual provides the following definition: Competent person An individual who has acquired substantial expertise or a recognised qualification for undertaking life cycle costing studies and is not professionally connected to a single manufacturer. It is the responsibility of the assessor to determine whether an individual meets this definition, and they must provide evidence and justification (if necessary) in their assessment. BREEAM does not approve or hold a list of competent LCC practitioners.

Leak detection between building and utilities meter - KBCN1116

For all pipework which is the responsibility of the building owner or occupier leak detection is generally required between the building and the utilities water meter. This requirement is applicable regardless of the length of the pipework. However, for campus type developments or those with multiple buildings on the same site served by common pipework, leak detection is required both within the building and externally for the length of pipework that exclusively serves that building. Where it can be demonstrated that it is not physically possible for a meter to be installed on the pipework outside the building, the requirement for leak detection between the building and the utilities meter can be considered not applicable, and the credit awarded based on the leak detection within the building. 
02 Jul 2024 - Updated to account for campus type developments. Applicability to UK NC V6 and INC V6 confirmed.

Leak detection technologies – Compliance Principle - KBCN1566

Where it can be demonstrated that alternative water leak detection technologies can meet or exceed the capabilities of systems set out in the BREEAM guidance, subject to approval, these can also be considered compliant. It is the role of the Assessor and the project team to provide evidence and justification in a compliance principle query (see KBCN1555). The following alternative solutions are currently recognised:

Life Cycle Cost - KBCN0385

Life Cycle Costing (LCC) is a methodology that aims to generate a cash flow prediction over a given period of time for a building and undertake option appraisal studies to evaluate various solutions in order to determine the optimal option. An LCC should therefore consider: This allows project teams and clients to make informed choices about the long term financial implications of different design decisions. 
24-Oct-2024 - Updated for clarity
27-Mar-2024 - Wording and requirements clarified.  Scheme applicability updated.
 

LZC technologies – energy centre or other LZCs connected at a later stage - KBCN0267

If a project specifies LZCs that have been proposed in the feasibility report which reduce emissions, and/or will be connected to a site-wide energy centre operational at a later stage of the phased development, after the Post Construction Stage review has been submitted, the Energy and Pollution issues can be assessed as follows: In a phased development where the primary heating system will be upgraded at a later stage than the building being assessed, a commitment to install the new heating source must be made in the General Contract Specification (as per the BREEAM requirements). BREEAM does not specify a particular time for phasing as it is difficult to set parameters, however as a rule building users should have to wait the least time possible before they can use the upgraded heating source. For the quality audit, two Energy model outputs/EPCs must be produced at the final stage - one with the actual interim system installed for building control, and one for the BREEAM assessment which can include the predicted energy from the proposed energy centre.  Additionally, the legally binding general contract specification for the new heating source must be submitted with details of the timescales proposed for the completion of the second phase of work. Where this approach is to be followed BREEAM must be consulted in each case to ensure that the arrangements are sufficiently robust to award the credits. BREEAM seeks to recognise the environmental impacts of a building's energy use throughout its life, therefore temporary arrangements can be accommodated, provided there is robust evidence on future connection to the permanent systems. 
24/08/2022 - Applicability to UKNC V6 confirmed

Measurements and calculations for reporting on amenities – design stage - KBCN1381

Reporting on accessible amenities is an explicit requirement of the Site-Specific Transport Assessment in Tra 01. However, if this assessment does not provide enough information to satisfy the relevant requirements for Tra 02, it must be supplemented by an additional report. This does not have to be provided by author of the transport assessment, and could, for example, be produced by the BREEAM assessor or a member of the design team.   
02 Nov 2023 - Reference to calculating the AI removed. This, and reporting on accessible amenities are explicit requirements of the transport assessment in Tra 01. Title and wording updated to clarify the intent and made applicable to Tra 02.

Measuring ecological change – Using Defra Metric 3.0, 3.1, 4.0 and the Statutory Biodiversity Metric - KBCN1476

Defra Metric 3.0, 3.1 and 4.0 have been mapped to the BREEAM Change in Ecological Value Calculator and can be used in assessments for BREEAM UK New Construction 2018, BREEAM Infrastructure Version 6 (formerly CEEQUAL Version 6), and Home Quality Mark ONE. Please see the table below for the applicable benchmarks where Defra Metric 3.0, 3.1 or 4.0 is used. The benchmarks from the Defra Metric are taken from the lowest score from the three metrics (Habitat, Hedgerow, River). If a metric is not present, e.g. there is no river on the site, the score of 0 for that metric must be ignored when taking the lowest score.
Metric result Credits awarded
BREEAM (GN36) / Defra Metric 2.0 Defra Metric (3.0, 3.1, 4.0) and the Statutory Biodiversity Metric BREEAM UK NC 2018 HQM ONE BREEAM Infrastructure V6
Less than 75% Less than -25% 0 0 0
Between 75% and 94% Between -24% and -6% 1 2 10
Between 95% and 104% Between -5% and 4% 2 4 20
Between 105% and 109% Between 5% and 9% 3 6 30
110% and above 10% and above 3 + 1 exemplary level credit 8 40
The above approach can be used to determine the percentage score that describes ecological change in Guidance Note 36 (Table 9: Reward Scale), if the following is also met: Alternatively, the BREEAM Change in Ecological Value calculator tool will continue to be accepted until stated otherwise. 
03 Mar 2022 - Updated to clarify how Defra Metric 3.0 can be applied to current schemes
27 May 2022 - Updated to Defra Metric 3.1
21 Sep 2022 - Clarification on the figure to use from Defra Metric 3.0 or 3.1
14 Oct 2022 - Updated following rebrand of CEEQUAL to BREEAM Infrastructure
16 Feb 2023 - Added rules and clarification from KBCN1407.
01 Jun 2023 - Addition of DEFRA Metric 4.0

NABERS – Compliance with the requirements of Ene 01 - KBCN1463

Undertaking energy modelling for NABERs (DfP process) can be used to demonstrate compliance for the 4 predicted energy modelling credits and also the 2 exemplary credits for committing to post-occupancy measurement of energy.

Night-time operation – requirement for controls - KBCN1048

Projects or areas of an asset which operate at night-time can adapt or omit the requirement to provide controls or presence detection to align with the building’s hours of operation. This could, for example, include service yards or car parks. The aim of this Issue is to reduce the energy use for external lighting and should not interfere with the building’s operation. 
02 Oct 2024 - Updated to clarify the scope of the this guidance and applied to NCV6 and BIU.

Off-site waste sorting / no dedicated on-site waste storage - KBCN0696

BREEAM assesses the dedicated space for recyclable waste storage. Where this space does not exist: For NC or RFO The aim of the issue is met by provide evidence covering all points 1-4:
  1. A waste management plan which provides on-site storage between collections, adequately sized based on the frequency of collection.
  2. An on-going waste recycling contract.
  3. The typical recycling rates from the waste management company.
  4. A permanent internal or external space within the asset site boundary that can be converted to comply with all criteria requirements. Drawings must be provided showing how this space could be converted in future, including meeting all relevant criteria for: • User and vehicle access, • Area requirements for waste storage, • Appropriate size and number of containers for the expected waste streams, and • Space allowance for any additional waste processing requirements e.g. compactors, composting containers, water outlets etc.
This ensures that there is: BIU V6 Commercial only The above approach for NC / RFO only applies to waste storage for construction fit-outs, which are temporary in nature. It does not apply to any other credits, and compliance cannot be met based on future commitments. This means that the above approach: For BIU, new storage areas will be recognised once they are completed and assessed in future certification cycles. 
22-Jan-2025 - Updated text to allow for permanent external spaces, aligning with KBCN1716. Scheme applicability updated.
18-Nov-2024 - Requirements for BIU projects clarified relating to all answers in Rsc 02. Title clarified.
09-Feb-2024 - Requirements clarified. Applicability updated to include construction waste storage for BIU V6 Rsc 02.
17-Jan-2024 - Scheme applicability updated.
16-Apr-2018 - Wording clarified.

On-site LZC – whole site shared connection - KBCN1424

To be recognised in BREEAM, the on-site Low and Zero Carbon (LZC) technology must have a direct physical connection to the assessed asset. OR Where the LZC technology is; It is acceptable to allocate the renewable energy generated proportionally as a calculation of the asset's predicted energy consumption compared to the total energy consumption of the whole site. To allocate renewable electricity by proportional consumption: Where consumption data is missing, renewable electricity must not be allocated to the assessed asset. In this case, it is assumed that all electricity consumed is sourced from the grid. 
17-Jan-2024 - Applicability BIU V6 Ene 13 removed, as this approach is not applicable to assessing the area of PV fitted.
21-Dec-2022 - Applicability to In-Use V6 confirmed.
24-Aug-2022 - Applicability to UKNC V6 confirmed.

Operational waste facility – extension of definition – compliance principle - KBCN1716

The original intent in BREEAM was that an operational waste facility is a centralised, on-site permanent enclosed structure or dedicated internal space in the asset. However, this approach is not always suitable for all asset types. Compliance principle The definition of operational waste facility is expanded to include dedicated external spaces. The principles for operational waste facilities are that they: The table below shows how the original principles are adapted for dedicated external spaces. BIU V6 Commercial only This compliance principle also applies to the storage of:
Principle Compliance principle
Dedicated and permanent. This space can be a dedicated and permanent external space.
Adequately sized and equipped. External spaces must still meet relevant requirements for size, required waste processing equipment and water outlets for composting. Where the asset contains multiple tenants or user groups with different needs, the waste facility can be multiple spaces, provided all of them meet the criteria. The minimum size calculation requirement is based on the combined area of all waste facilities.
Appropriate access and accessibility. The external space must meet requirements for size and access for all relevant users and vehicles, Any external spaces must also be adequately lit through a permanent lighting solution that is fit for purpose. Compliance for this could be shown through meeting criteria in other issues relating to external lighting.
Easy to find. As well as permanent signs, external spaces can be marked out through permanent ground markings, bollards, or other permanent features.
Minimises disruption. Any external facilities must: -       Minimise light pollution and disruptive glare to neighbours, if the space is lit at night. -       Minimise any contamination and air quality issues arising from waste stored. -       Minimise disruptive noise during operation. Justification and, where relevant, evidence of mitigation measures must be provided to show how these principles are being met. Evidence from other relevant assessment issues can be used.
     

Parts of the building not subject to national thermal regulations - KBCN0534

Where you have parts of the assessed building which are not subject to national thermal regulations then these should be omitted from the EPR calculation. 
24/08/2022 - Applicability to UKNC V6 confirmed

Pods or privacy booths used as workstations – Impact on view out - KBCN1697

Provided the space or room itself is compliant based on a more traditional furniture arrangement, the enclosure of workstations in booths or pods can be disregarded when considering compliance with the ‘View out’ criteria.

Post-construction measurement – formaldehyde / VOC levels exceed limits - KBCN0258

If the measured formaldehyde / VOC concentrations were above the prescribed limits, the appropriate remedial action must be taken, as described in the IAQ Plan. The criterion requires confirmation of 'the measures that have or will be undertaken' however it does not specifically address re-testing. We would expect, however that the IAQ Plan should outline what remedial measures are appropriate depending upon the severity and type of the non-compliance with prescribed limits. Such measures may include re-testing as a matter of 'best practice'. Where levels are found to exceed these limits, the project team confirms the measures that have, or will be undertaken in accordance with the IAQ plan, to reduce the TVOC and formaldehyde levels to within the above limits. 
10-Oct-2022 - Title amended to align with standard KBCN naming format for clarity and consistency. Made applicable to UK and International NC V6.

Post-construction measurement – sampling methodology and KPIs - KBCN0380

When testing for VOCs post-completion and pre-occupancy, a representative sample of the building needs to be carried out. Each sample TVOC and formaldehyde measurement needs to achieve the threshold levels individually, either in the initial testing or after remedial measures have been implemented. This ensures that all tested areas of the building are below the limits, and that areas of non-compliance are not ‘averaged out’. 'When providing KPI test results for air quality post-construction / pre-occupancy within scoring and reporting tool, where the limits are exceeded and remediation and re-testing are carried out, the figure should be an average for the whole building post-remediation, as this is the key figure that reflects the building at its certified state'. Where testing is not a requirement of the IAQ Plan and this is not carried out, the original testing figures should be entered and the assessment report should provide details of the remediation measures undertaken to reduce these to within the prescribed limits. 
10-Oct-2022 Title amended to align with standard KBCN naming format for clarity and consistency. Scheme applicability updated.
06-Dec-2017 Amended to account for situations where re-testing is not required by the IAQ Plan.

Post-construction measurement- TVOC concentration using BS ISO 16000-6: 2021 VOCs in air by active sampling - KBCN1642

Where BS ISO 16000-6: 2021 VOCs in air by active sampling is used, the TVOC concentration measurement can be performed over a 40-60 minute period.

Potential for natural ventilation – mechanically ventilated and mixed mode assets - KBCN1533

Scope of KBCN This KBCN clarifies the associated compliance note for this credit. Clarification Mechanically ventilated and mixed mode assets can potentially achieve the 'potential for natural ventilation' credit by:
  1. Meeting the relevant criteria for room depth and glazing area OR, where this is not possible:
  2. Show through modelling that the building has the potential to be ventilated entirely via a natural ventilation strategy.
For 2. the second paragraph of the CN allows flexibility in demonstrating adaptability to an entirely natural ventilation strategy. An asset can allow for mechanical ventilation for ≤ 5% of its annual operating hours to boost ventilation rates, and (for this credit) can still be considered to be a fully naturally ventilated strategy. ≤ 5% mechanical ventilation requirement The focus of this credit is to demonstrate future adaptability to introduce fresh air into the asset for occupant comfort, so this requirement relates only to the time that mechanical systems are used to drive air through the asset. The use of active heating / cooling is not considered in this calculation. Natural Ventilation Heat Recovery Units (NVHR) systems can also be used, provided it meets this ≤ 5% requirement. ≤ 5% is a weighted average over all of the asset's occupied spaces. The basis for the weighting will be determined by the modelling software used. Scope and time scale of modelling The modelling covers all occupied spaces. Where relevant, exclusions are allowed - see related KBCNs for details. The modelling period is one year, during the asset's operating hours. The modelling must be based on a plausible scenario that is realistic. This means that: 
22-Oct-2022 Content from KBCN1126 merged to this KBCN.

Prediction of operational energy consumption – Multiple (similar) buildings assessments - KBCN1479

Sampling is not appropriate to meet the aim of the criteria; it is necessary to model the predicted operational energy consumption of all assessed units. Credits are awarded for undertaking the detailed modelling, therefore there is no requirement to identify the worst performing unit and KNCN1382 is not applicable. 
24/08/2022 - Applicability to UKNC V6 confirmed

Prediction of operational energy consumption – alternative route to Excellent minimum standard - KBCN1336

Where the ‘Prediction of operational energy consumption’ criteria are achieved, the minimum standard for Excellent in Ene 01 is met. This is independent of meeting any minimum credit score in the issue to achieve the Excellent minimum standard. See KBCN1602. Substantial improvement To meet this minimum standard, the asset must show a substantial improvement in operational energy performance, following the ’Prediction of operational energy consumption’ criteria. This 'substantial improvement' is defined as achieving 4 credits using amended metrics generated using the dynamic simulation modelling and for: Amended definitions Performance is calculated based on amended definitions of an actual and a notional building: Amended actual building: Amended notional building: *The notional building servicing system may be replaced with a gas boiler as the heat generation source. Where the performance improvement over the amended notional building does not achieve 4 credits, the BREEAM Excellent standard may still be met. Robust evidence must be provided showing that this level of performance improvement is not possible, based on constraints outside of the control of the project team. Additional notes for UK schemes Projects assessed under UKNC V6.1 can manually input amended figures from the modelling into the platform to demonstrate the 'substantial improvement'. See "DSM Alternative Ene 01 inputs" in BREEAM Projects for this issue. For the energy modelling and reporting criteria, the CO2 metric can be calculated using either: 
08-Nov-2023 - Additional wording and link to KBCN1602 added to clarify situation for UK simple buildings.
26-Jun-2023 - Content updated to apply to International schemes. Title and wording clarified. Text on manual errata in NC 2018 3.0 moved to KBCN1602.
14-Jun-2023 - Note added to confirm this is integrated into the platform for UKNC V6.1 in all countries. 
24-Aug-2022 - Content updated and applied to UKNC V6
19-Aug-2019 - Clarification for UKNC 2018 3.0.

Prediction of operational energy consumption – passive design analysis - KBCN1647

The credits for ‘Prediction of operational energy consumption’ in Ene 01 require the project team to have first identified opportunities to implement passive design measures. For Ene 01, it is acceptable for the analysis of potential passive design measures to be completed later than Concept Design if there are still opportunities to implement passive design measures in the project. The intention of including the criterion on passive design analysis in Ene 01 is to ensure passive design features that could reduce the operational energy demand of the building have been considered before credits are awarded for predicting operational energy demand. The analysis must occur when there are still opportunities to influence the design.

Presence detection – illuminated signs - KBCN1671

The requirements for presence detection do not apply to illuminated signs. In BIU V6, presence detection requirements are included as part of automatic energy saving controls. All other requirements in this criteria must still be met.

Principal contractor or subcontractor no longer operational - KBCN0590

In situations where the principal contractor or other company involved in the project is no longer operational where, for example, the company has gone into administration, the assessor may be unable to obtain all the evidence to meet the requirements of BREEAM or HQM. For some BREEAM Issues, it may not be possible to demonstrate compliance retrospectively, and in such cases, the relevant credits must be withheld. However, in this situation, a lack of complete evidence will not, in itself, prevent the project from achieving a BREEAM rating and, where relevant, a prerequisite or minimum standard can be waived. For example:

UK NC V6 Man 03 Prerequisite - Legally harvested and traded timber or INC V6 Wst 03a – 1 credit to achieve an Excellent Rating

This is based on the project team demonstrating appropriate efforts to obtain the evidence from the company in administration and providing the following: 
28 Oct 2024 - Title and general approach updated. Applied to HQM One/V6 and NC V6.

Quantifying the reduced total energy demand and CO2 emissions resulting from passive design measures - KBCN1677

Please note that in order to demonstrate the reductions from passive design measures, the notional building figures may be taken from the energy model to confirm the building without passive design measures, to compare against the actual building figures, which will include passive design measures.  A separate energy model is therefore not necessarily required for the building without passive design measures.

Recyclable, general and organic waste storage – space, labelling and segregation - KBCN1577

Strategies may vary according to the specifics of each project, their waste streams and collection arrangements. The aim of these requirements is to encourage recycling, ensuring that it is correctly sorted and to prevent cross-contamination of waste streams. Label the recycling area This is required to alert building users and collection agencies to the location of the recycling facility. Label each recyclable waste stream This can be done by labelling the bins or their dedicated space within the recycling facility, or both. Mixed recycling bins and / or spaces are clearly labelled with their constituent waste streams. General or organic waste have their own dedicated spaces Sufficient space for general and, where relevant, organic waste is required in addition to meeting the requirements for recyclable waste. This does not have to be within a separate facility, but if combined with recyclable waste storage, there is greater risk of cross-contamination. The following requirements apply in this situation: If provision of waste bins is out of scope Where the provision of waste bins is outside the scope of the developer, it is clearly not possible to label the bins. In this situation, the following compliance options are available: 
21-May-2024 - Link to KBCN0696 removed. Merged with KBCN1380. Minor clarification added on mixed recycling.

Reference to post occupancy evaluation or post occupancy stage assessment - KBCN1718

Criterion 6 is only applicable for those projects proposing to undergo a post occupancy evaluation process such as BREEAM In-Use or NABERs (please see KBCN1532).  It does not specifically relate to a post occupancy evaluation under Man05.

Registering assessments to UK NC2018 or UK NC V6 – Version of Part L - KBCN1535

BREEAM UK New Construction 2018 was developed for buildings in England which are demonstrating compliance against Part L 2013. The New Construction V6 version is intended for buildings in England which are demonstrating compliance against Part L 2021. Accordingly, UK NC 2018 will only accept 'inp' files created using Part L 2013 building regulations software for England and UK NC V6 will only accept 'inp' files created using Part L 2021 building regulations software for England.   Assessments already registered to BREEAM UK NC 2018 that must comply with the Part L 2021 of the Building Regulations may follow either of the options below:
  1.  Transfer to the UK NC V6 scheme
  2. Assess under UK NC 2018 and do two Part L models:
New assessments subject to Part L 2021 may register to UK NC V6 or follow Option 2, above. 
10 Feb 2023 - Applied to Issue Ene 01 to improve visibility

Responsible sourcing certification – validity - KBCN1693

Where it can be demonstrated that the responsible sourcing certificates were valid either at the time of specification, or at the time of purchase, they may contribute to the awarding of the credits. BREEAM is primarily trying to encourage designers to take responsible sourcing into consideration when specifying or selecting products and as such it is not necessary for certification to be valid at the time of design or post-construction stage submissions.

Restricted movement within a secure perimeter - KBCN000009

Where the movement of pedestrians, cyclists and vehicles is tightly controlled within a secure perimeter due to security considerations, these areas do not need to strictly meet the safe access criteria. However, justification and evidence provided by an appropriate member of the project team must demonstrate how the layout, measures and secure nature of the site result in a safe environment for cyclists, pedestrians, and vehicle access, in line with intent of each criterion. Where a criterion is not applicable due to the secure nature of the site, this should be noted and justified in the assessment report. Previous guidance - superseded on 24 May 2024* Where the movement of pedestrians, cyclists and vehicles is tightly controlled within a secure perimeter due to security considerations, these areas may be excluded from the safe access criteria. Where the whole assessment is within such a zone, the credit may be awarded by default. 
24 May 2024 - New guidance introduced to ensure that safe pedestrian, cycle and vehicle movement is considered, even on secure sites with restricted movement.
* As this is a significant change, for any registered assessments where the assessor demonstrates that they have already advised the project team based on the previous guidance, the assessment can continue on that basis. 

08 Jun 2022 Applicability to UK NC2018 confirmed

Retail/Industrial Showrooms Appendix - KBCN1115

This Criteria Appendix has been developed for developments such as car showrooms which incorporate both retail and industrial areas. The appendix clarifies, for specific BREEAM issues, which criteria are applicable to each area of the assessment. This should be read in conjunction with the relevant scheme version of the BREEAM UK  technical manual. This is applicable to BREEAM UK New Construction 2014, 2018 and V6 and BREEAM UK RFO 2014. Such assessments should be registered against the 'Retail' building type and the Appendix will soon be available for download in the guidance for 'Retail' assessments for each relevant scheme on BREEAM Projects. In the meantime, the Criteria Appendix can be requested by emailing [email protected] 
22/09/2022 Applicability to UK NC V6 confirmed
22/05/2018 The title of this appendix has been changed and additional information provided. This includes removal of the specific reference to 'Car Showrooms' in order to clarify that this approach can be applied to other similar retail developments, which include industrial servicing areas.

Safe access criteria requirements for small infill developments and extensions - KBCN0810

For smaller infill developments (typically those with a total gross floor area of less than 1,000m2) where there is no opportunity to make changes to the surrounding site or access to the building itself (other than those directly related to connecting building access points to existing pathways etc.), it is recognised that full compliance with the BREEAM criteria for safe access may not be achievable.  This applies to developments where either: In such instances the existing site layout should undergo a risk assessment against the BREEAM 'Safe Access' criteria to identify areas where there is potential for enhancement across the site.  The findings should be reported to the client and design team and any non-compliant aspects should be resolved as far as practically possible within the scope of the project, however there is no express requirement to achieve full compliance in every respect.  Where the assessor is satisfied that the above requirements have been met,  the credit for 'Safe access' can be awarded. 
31/03/17 Reference to achieving 'Security' credit removed
17/12/24 Applicability updated to include UKNC 2018 and V6

Sanitary fittings used in religious practices – updated - KBCN1624

Such fittings should not be included in the scope of this Issue. Please refer also to KBCN0418 This guidance relates to fittings and facilities used in some religious practices, for example, for washing before prayer. 
03 Nov 2023 - Updated. Previous guidance was incorrect and contradicted the approach outlined in KBCN0418

Scope of issue – clarification – fixed installations - KBCN1660

The scope of this issue covers noise from external building services (or 'fixed installations' as written in the manual) serving areas designed for human comfort. The noise impact assessment excludes:

Scope of the criteria for lifts – Small service lifts (dumbwaiters) - KBCN1589

Small service lifts, of the type typically used to transport prepared food and crockery in restaurants (sometimes referred to as 'dumbwaiters'), fall outside the scope of this assessment issue.

Secure Government sites – Security criteria - KBCN1652

Government security procedures, such as those for MoD sites, may take precedence in dealing with security risk. Therefore, the security criteria under which this issue is assessed may not be fully appropriate. However, BREEAM requires that a Suitably Qualified Security Specialist (SQSS) or the relevant Government department's security consultant undertake a risk-based security needs assessment during or prior to the Concept Design stage. The final design must embody the recommendations of the security consultant. Evidence requirements Where it is confirmed that, due to security issues, the assessor cannot provide complete evidence of the security assessment and implementation of the recommended measures, the following can be accepted: A written statement or report from the SQSS confirming:

Self-contained dwellings / bedrooms with shared facilities – mixed recycling - KBCN1664

Where there is mixed recycling, the number of recyclables containers can be reduced to match the final waste streams being collected. For example, the standard BREEAM requirement is three recyclables containers per dwelling / communal facility. The total combined storage volume requirements are the same as stated in the manuals. To apply this KBCN, the project team must provide evidence to QA of the waste collection policies that apply to the asset.

Shell only – retail glazing not within scope - KBCN0937

Where a retail building envelope is not complete and glazing will be provided by the future tenant/(s), there are two options available: A 'Green fit-out agreement' (see Definition under this Issue in the technical manual) can be used to ensure that the performance level of the glazing used in the energy model is met in the completed building. This must be accompanied by evidence that the performance of the assumed glazing does not impose overly onerous requirements on future tenants and that it falls within the scope of glazing typically used in retail developments. Alternatively, the assessment can be based on worst permissible performance under the relevant national building regulations. In all cases, for shell only assessments, the assessment method detailed in CN1 (for UK New Construction 2014 and International New Construction 2016) and Assessment type specific note 1.3 (for UK New Construction 2018 and UKNC V6) must be followed. 
24/08/2022 - Reference and applicability to UKNC V6 added
14 11 2017 Wording amended to clarify the intent

Shell only – zero net regulated carbon emissions - KBCN1101

For Shell only projects, 9 credits can be awarded when the EPRED ratio is 0.90, without the requirement for zero net regulated CO2 emissions applying. Shell only projects only assess the buildings heating and cooling energy demand and so credits are awarded just on this basis. 
24/08/2022 Applicability to UKNC V6 confirmed

Shell only – Energy modelling requirements - KBCN1488

For a shell only assessment, only the EPR demand metric is used to determine the energy performance. Therefore, we would not expect to see improvements to equipment and services accounted for in the BRUKL/NCM calculation. It is, therefore, recommended that assessors submit a BRUKL/NCM document incorporating the fabric improvements, but which retains the equipment and services of the notional building with heating and cooling provided by multi-split systems. Credits for shell only assessments are determined by the demand metric alone. The inclusion of more efficient equipment and services may, therefore, lead to lower heat gains, a subsequent increase in demand for space heating and, hence, a lower number of credits being awarded. 
28 Aug 2022 - Guidance updated and applied to UKNC V6

Shower with multiple shower heads - KBCN0855

To calculate the water use of a shower with more than one shower head, one of the following should be done: 
22 Feb 2024 - Applied to BIU, BREEAM NC and RFO standards

Showers and taps where use is physically time-limited – Calculating flow rates - KBCN1690

Where a timer is used to physically limit the use of showers or taps within a set period of time, this can be used as the basis for calculating a reduced flow rate. For example, where use is limited to 2 minutes, 4 times per hour, for a shower or tap with a flow rate of 8 l/minute, the flow rate can be calculated as follows: 8l/minute x 8 minutes/hour = 64 l/hour = 1.07 l/minute

Similar speculative developments (Shell and Core) - KBCN1382

For speculative, Shell and Core projects there will be a significant level of uncertainty regarding equipment loads and usage patterns. Project teams should make the best estimates they can based on available data for similar projects, instead of using the National Calculation Methodology occupancy assumptions. Where sites have multiple speculative, Shell and Core buildings it is acceptable for the 'Prediction' work to be the same across all the units. The design team would need to be sure that all the units would have the same type of tenant and be used in the same way. This is in keeping with the aim of the 'Prediction' credits; to predict energy consumption as accurately as possible. If the users are known to be different, this approach would not be acceptable. 
24/08/2022 Applicability to UKNC V6 confirmed

Single functional area and no tenanted areas – operational energy monitoring - KBCN00056

Where the building has a single functional or tenanted area for sub-metering, with no other significant energy uses that must be separately metered, then: 
26-Mar-2024 - Wording clarified. Scheme applicability updated.

Speculative floor finishes – Take-back and re-use policy - KBCN1702

Where a developer has an established written policy whereby unwanted floor finishes will be removed for re-use elsewhere prior to the tenant taking possession, this can be considered as meeting the aim of this issue. This is only applicable to types of flooring which are suitable for re-use, can be easily removed and do not require the use of adhesives or other permanent means of fixing. Additionally, the tenancy agreement must otherwise prohibit the removal of the flooring by the tenant Evidence to support this approach would include: • A copy of the take-back policy • Details of the flooring type and material • A copy of the tenancy agreement

Statutory requirements for energy modelling differ from BREEAM - KBCN0127

For the purposes of BREEAM, Issue Ene 01 should be assessed using a BRUKL output based on the prevalent UK country Building regulations applicable to that scheme. This applies even when the building does not need to undertake energy modelling to comply with Building Regulations.

Where a different analysis is required for statutory compliance, due to the location of the project or registration to an earlier or later version of Part L, a different output must be produced for this purpose.

Alternatively, where applicable, the BREEAM registration could be updated to the latest version, so the same energy model output can be used for both purposes. To maintain consistency and comparability for all assessments registered to a scheme. 
24/08/2022 Applicability to UKNC V6 confirmed

Sub-metering technologies – Compliance Principle - KBCN1561

Where it can be demonstrated that alternative sub-metering technologies can meet or exceed the capabilities of systems set out in the BREEAM guidance, subject to approval, these can also be considered compliant. It is the role of the Assessor and the project team to provide evidence and justification in a compliance principle query (see KBCN1555). The following metering standards or technologies are currently recognised as alternatives to pulsed output meters:

Sub-metering using non-intrusive load monitoring (NILM) systems - KBCN1710

Non-intrusive load monitoring (NILM) systems cannot be used to demonstrate compliance for the sub-metering credits within BREEAM. Hardware-based sub-meters must be installed. NILM systems are generally retrofit systems which can be easily removed and are not integral to the building or installed building services.

Summary of changes – BREEAM UK NC V6 - KBCN1530

BREEAM UK New Construction Version 6 (UK NC V6) was released on 24 August 2022 following the updates to building regulations in England that came into force on 15 June 2022. The update enables new buildings in England using the latest version of Part L (2021 edition) to register and complete BREEAM UK New Construction assessments. Buildings in England using the previous version of Part L (2013 edition) must continue to register and complete assessments using BREEAM UK New Construction 2018. Buildings in Scotland, Wales, and Northern Ireland may register and complete assessments using either BREEAM UK New Construction 2018 or BREEAM UK New Construction Version 6. The changes from BREEAM UK New Construction 2018 (UK NC 2018) are listed in the table below. The updates are limited in scope and only effect the assessment of: All other assessment issues remain unchanged from UK NC 2018. Further updates will be released when building regulations are updated in other UK nations.
Location Description of change
Ene 01 Energy performance (Ene 01 calculator): Updated translator curves for buildings in England using the latest version of building regulations (Part L2, 2021 edition). The Ene 01 calculation methodology is described in an updated version of GN39.
Ene 01 Prediction of operational energy consumption credits: Updated criteria for ‘Four credits – Prediction of operational energy consumption’. Includes new methodology section that replaces previous guidance in GN32.
Ene 01 Post-occupancy evaluation of operational energy consumption exemplary credits: Updated criteria for the two exemplary credits for ‘Post-occupancy evaluation of operational energy consumption’. Replaces requirement for a specific post-occupancy stage assessment.
Hea 02 Indoor air quality (IAQ) plan prerequisite: Update to criteria for ‘Prerequisite – Indoor air quality (IAQ) plan’. The criteria now specifically mention consideration of purge ventilation and local authority plans and policies. The changes have also been applied to an updated version of GN06.
Hea 02 Ventilation credit: Updated criteria for ‘One credit – Ventilation’. Updated requirements for specifying or installing carbon dioxide (CO2) sensors in occupied spaces, plus a new requirement to report the number and coverage of installed sensors. Specific reference to CIBSE AM13 for buildings with mixed-mode ventilation.
Hea 02 Post-construction indoor air quality measurement credit: Update to criteria for ‘One credit – Post-construction indoor air quality measurement’. The total volatile organic compound (TVOC) concentration level measured post-construction has been reverted to 300μg/m³ (was 500μg/m³ in UK NC 2018).
Scope, Ene 02, Wat 01, Wat 02 Updated references to post-occupancy stage assessment, following amendments to exemplary credits in Ene 01.

Summary of changes – BREEAM UK NC V6.1 - KBCN1600

BREEAM UK New Construction Version 6.1 (UK NC V6.1) is a minor update to BREEAM UK New Construction Version 6.0 to incorporate changes to the building regulations for energy performance in Scotland, Wales, and Northern Ireland. It was released on 14 June 2023. The updated version of BREEAM UK New Construction Version 6 now incorporates new translator curves for the Ene 01 calculation methodology in Scotland, Wales, and Northern Ireland. This follows the changes that were introduced for England in Version 6.0 (see KBCN1530). The main changes are listed in the table below. All changes are listed in the ‘Schedule of changes’ in the technical manual. The update includes some minor corrections for known issues in BREEAM UK New Construction 2018 and Version 6.0. Relevant knowledge base compliance notes (KBCNs) from UK NC 2018 and UK NC V6.0 can continue to be applied to UK NC V6.1.
Location Description of change
Ene 01 Energy performance (Ene 01 calculator): Updated translator curves for buildings in Scotland, Wales, and Northern Ireland using the latest version of the building regulations and SBEM outputs in these countries. The Ene 01 calculation methodology is described in an updated version of GN39.
Ene 01 Energy performance (multi-residential assessments): Updated methodology for multi-residential assessments that include SAP component using the latest version of the building regulations and SAP outputs in all UK countries.
Ene 01 (online platform) Multiple file upload: Projects assessed under UK NC V6.1 can upload multiple _BRUKL.inp files for a single assessment and the platform will perform the calculation described in KBCN1083.
Ene 01 (online platform) Alternative route to Excellent: Projects assessed under UK NC V6.1 can manually input amended figures from the dynamic simulation modelling into the platform to demonstrate the 'substantial improvement' required to achieve the Excellent minimum standard via the alternative route in KBCN1336.
Ene 01 Clarified the structure and wording of the exemplary credits for 'Beyond zero net regulated carbon'. The requirements and the number of credits available are still the same.
Ene 08 Removed drying lines option for multi-residential assessments (previously item 5b in section on ‘Domestic-scale appliances’).
Hea 05 Updated reference to the latest design guidance for law court buildings.
Pol 05 Updated the background noise level thresholds in criterion 4. [Incorrect change reverted in V6.1.1. See June 2023 Process Note.]
Tra 02 Updated minimum power for electric recharging stations to 7kW (in Table 7.4 ‘Sustainable public, private and active transport measures’, assessment option 4). 
08/11/2023 - Entry for Pol 05 updated to clarify.

Sustainable procurement plan – timing - KBCN1659

Where a sustainable procurement plan is not in place before Concept Design (as required in the criteria), the credit can still be achieved if: 
07 March 2025 - Reference to end of Concept Design removed in lieu of prior to specification documents being developed, to allow more flexibility on D&B projects.  Full justification will be required where this is to be applied.
 

Third-party verification – Timing - KBCN1603

The third-party LCA verification requirements for concept and technical design stages do not need to be completed at a specific project stage. It is, for example, acceptable for these to be verified as a single exercise, following technical design stage.

Time critical requirements – Concept / Technical Design stages - KBCN1711

The intent of the criteria relating to project stages in BREEAM is to ensure that actions are taken at a time when they can have the intended influence. Where projects are following these defined stages via a traditional procurement route, referring to the project programme and work stages are a robust and convenient way to demonstrate that the intent is met. However, not all projects will follow these work stages. In such cases, the project can show that the intent is met by demonstrating that, for the relevant BREEAM requirement, the activity has happened when the project is at an appropriate stage of development. Concept Design The project stage at which fundamental aspects of the design are developed. Technical Design Once a detailed planning application has been submitted, many aspects of the design will be fixed, and the project is at Technical Design stage. Depending on the procurement route, there may be an overlap between technical design and the construction phase of the works. Additional guidance Sometimes different aspects of the design might be at different project stages. KBCN1156 gives detailed guidance on how to define the project stage for each construction element, based on the design information available for that element. Although it was originally written specifically to address Mat 01 LCA for UK NC 2018 and V6, it may be useful in other situations.

Time critical requirements – defining project stage by construction element - KBCN1156

This KBCN was originally written to specifically clarify BREEAM requirements for Mat 01 Concept / Technical Design under NC 2018 and V6. However, the general principles may also be applicable to other assessment issues. As a building design process passes through successive work stages, increasingly more aspects of the design become fixed. BREEAM criteria often require actions at, before or after specific project work stages, as these are the optimal stages to achieve the required sustainability outcome. When undertaken at a different stage, the criteria may be difficult to comply with, opportunities may be missed, options limited or costs may become prohibitive. Knowing which stage your project is at Where possible, BREEAM refers to industry-standard work stages, for example the RIBA plan of work stages. However different project teams can interpret these referenced stages differently. Furthermore, many projects do not follow these stages in a simple linear fashion for all aspects of the design at the same time. For instance, the envelope design may be well advanced even to the point where installation has commenced before any specification decisions have been made on some interior finishes. As such, a project may not be at one project stage for all elements of the design at any one point in time. This Knowledge Base compliance note is intended to provide supplementary information to enable projects to determine what stage they are at with respect to time critical BREEAM requirements, including where different elements are at different stages. Although project team members may be willing to offer their opinion on the stage the project has reached, this will often be subjective and hence inconsistent. Therefore, the process set out here looks at the currently available design information for the project (e.g. drawings, specifications) to determine the current work stage in relation to the issue under consideration. This provides a more objective, demonstrable approach for the assessor to follow. Concept Design Stage The RIBA definition of ‘Concept Design’ (RIBA stage 2) can be found here https://www.ribaplanofwork.com/PlanOfWork.aspx . The core objective given is ‘Prepare Concept Design, including outline proposals for structural design, building services systems, outline specifications and preliminary Cost Information along with relevant Project Strategies in accordance with Design Programme. Agree alterations to brief and issue Final Project Brief.’ Table 1 and table 2 (in the link below) provide further guidance, specific to BREEAM, to help determine whether a project, or part of the project relevant to the issue/credit, is at ‘Concept Design’ stage. If there is ambiguity or uncertainty about the stage of the project, the assessor should check with the design team whether the design documentation (drawings, specifications, BIM etc.) currently being produced by the design team will generally include the information listed. It is possible for different aspects of the project to be at different stages in terms of how progressed the design is. For example, the substructure design may be at technical design or even installed while the internal partitions are still at concept design. Whether this matters depends on the issue/credit being pursued. The following steps take this into account. Step 1 First, for the issue/credit being pursued, determine which of the relevant assessment scope items in table 1 and 2 are relevant. For example, if the issue/credit only relates to substructure, then only the substructure assessment scope items shall be considered. If the issue/credit is of a general nature concerning the whole project, then all the assessment scope items shall be considered. Step 2 For the relevant assessment scope items from step 1, decide which of the following applies the most: - Please note that the items listed are indicative of the typical information produced at ‘Concept Design’ stage. Technical Design Stage The RIBA definition of ‘Technical Design’ (RIBA stage 4) can be found here https://www.ribaplanofwork.com/PlanOfWork.aspx . The core objective provided is ‘Prepare Technical Design in accordance with Design Responsibility Matrix and Project Strategies to include all architectural, structural and building services information, specialist subcontractor design and specifications, in accordance with Design Programme.’ The following provides further guidance, specific to BREEAM, to determine whether a project is at the ‘Technical Design’ stage: The RIBA plan of work definition of ‘Technical Design’ clearly states that it should ‘…include all architectural, structural and building services information, specialist subcontractor design and specifications…’. Therefore, it is a simpler task to determine whether the project, or part of the project relevant to the issue/credit, is at this stage. If there is ambiguity or uncertainty about the stage of the project, the assessor should check with the design team whether the design documentation (drawings, specifications, BIM etc.) currently under production by the design team (and the contractor’s specialist sub-contractors, if applicable) will, when finished, generally include all the final design information required for the construction works on-site. Like concept design, it is possible for different aspects of the project to be at different stages in terms of how progressed the design is. The following steps take this into account. Step 1 First, for the issue/credit being pursued, determine which of the relevant assessment scope items are relevant (the assessment scope items given in table 1 and 2 may be used, but the rest of the information in these tables relates to concept design). Step 2 For the relevant assessment scope items from step 1, decide which of the following applies the most: - KBCN1156_IndicatorTables   
06-Nov-2024 - Scheme applicability updated. Title amended. Explanatory note added.
17-Jun-2019 - KBCN updated to provide additional guidance.

Use of as-designed BRUKL output for post-construction submission - KBCN0889

Where it is not possible to produce an as-built BRUKL output for the post-construction assessment, it is acceptable to produce an updated as-designed BRUKL output that accurately reflects the constructed building as evidence for the post-construction submission. A justification should be issued to QA clarifying why an as-designed BRUKL was submitted, along with confirmation from the relevant specialist that the model is an accurate representation of the final, as-built specification of the building. 
24/08/2022 Applicability to UKNC V6 confirmed

Using water from natural underground sources to offset water consumption - KBCN00094

Water from natural underground sources (for instance aquifer water accessed via boreholes) cannot be used to offset: A significant amount of water used for public consumption is already drawn from aquifers. Private boreholes may be drawing water from the same sources as public utility companies. 
27-Mar-2024 - Title and text updated to broaden definition. Scheme applicability updated.

Ventilation – external requirement for window opening restrictors - KBCN1032

Opening restrictors to windows may sometimes need to be installed to meet: Where such external requirements are in force, these requirements cannot be used as a mitigating factor for meeting the BREEAM ventilation criteria. Even with window restrictors, adequate ventilation can still be achieved. 
19-Oct-2022 Wording and title clarified. Scheme applicability updated.

Ventilation – filtration – non-residential assets - KBCN0797

Relevant specialist required The design and specification of air filtration for mechanical ventilation requires the input and review of a relevant ventilation designer or specialist. It is their responsibility to interpret the requirements of this KBCN to align with local conditions. Referenced standard The requirements for air filtration in mechanical ventilation systems follows EN 16798-3:2017 Section B4.2. This standard replaces EN 13779:2007. See KBCN1054. Supply air quality Outdoor air quality The filtering required to achieve SUP2 is affected by outdoor air quality. Outdoor air quality (ODA) in both EN 16798-3:2017 and EN 13779:2007 are defined as: As ODA definitions are relative to national air quality standards, these will depend on local regulations and the location of the asset. Please refer to the relevant specialist on how to correctly classify ODA for your asset. 
18-Nov-2022 Title amended to differentiate between residential and non-residential filtration KBCNs.
06-Sep-2022 KBCN re-written and re-named to clarify BREEAM ventilation filtration requirements in relation to new ventilation standards. Scheme applicability updated.

Ventilation – school office areas - KBCN0223

Office areas in schools should comply with listed office ventilation rates set in  'BB 101: Guidelines on ventilation, thermal comfort, and indoor air quality in schools'. 
19-Oct-2022 Title amended for clarity. Scheme applicability updated.

Ventilation – single room MVHRs - KBCN1042

Single room mechanical ventilation heat recovery units do not need to show that the air intake and exhaust are a suitable distance apart. However, the air intakes of these units must be located to minimise intake of other potential external pollutants. 
11-Oct-2022 - Title amended for clarity and consistency. Wording simplified. Scheme applicability updated.

VOC product emission certificates – validity - KBCN1689

Where it can be demonstrated that construction product emission certificates were valid either at the time of specification, or at time of purchase, they may contribute to awarding credits.

BREEAM is primarily trying to encourage designers to take construction product emissions into consideration when specifying or selecting products and as such it is not necessary for certification to be valid at the time of design or post-construction stage submissions.

Washing machines and dishwashers – Water consumption data - KBCN1571

The water consumption data used to demonstrate compliance may be based on the lowest full wash cycle (i.e. not a pre-wash cycle, for example).

Weather files – 2020s, 2030s and 2050s - KBCN0842

Timescale The weather files for each decade cover a 30-year climatic period around that decade. For example, 2020s weather files cover the period 2010 to 2040. 2020s are in the middle of the three decades (10s / 20s / 30s). NC - 2020s and 2050s New Construction projects assessed under the relevant standards should continue to use the 2020 weather files for mechanical ventilation, and the 2050 weather files for natural ventilation. CIBSE weather files are available here: CIBSE Weather Data RFO - 2030s and beyond When published, the original intent for RFO projects was for future thermal comfort to be based on projected climate change 15 years after completion. 
08-Jan-2024 - Added clarification on RFO 2030s data.
18-Dec-2024 - Merged with KBCN000006. Prometheus link updated. Title updated.
04-Jul-2024 - Clarified that 2020 and 2050 weather files are still valid for the applicable standards and guidance applied to all relevant UK standards. Applicability to international standards removed and link to CIBSE weather data added.
 

Weather files – 50th percentile - KBCN0117

For the thermal simulation of climate change environments, where this not specified in the manuals, the 50th percentile weather file is used in all cases. This applies also to the use of any alternative weather files or formats which are not listed in the manual. See KBCN1182. 
18-Dec-2024 - Title updated for clarity. Scheme applicability updated. Link to KBCN1182 added.

Weather files – alternative format or location - KBCN1182

If they achieve the aim of the credit, alternative weather file formats not listed in the manuals can be used instead of those referenced in the manual. Format - current climate The alternative weather files must include same variables as the specified weather files for each hour of the year e.g.: - Dry bulb & wet bulb temperature, - Wind speed & direction, - Solar altitude & azimuth, - Cloud cover etc. For example, TMY (Typical Meteorological Year) is an accepted alternative format for BREEAM, meeting the requirements above. The assessor or design team must verify this and ensure that meeting the BREEAM criteria does not become easier by using the alternative weather file. Format - projected climate These alternative files must be based on climate projections with equal or higher temperatures than those specified in the relevant criteria, setting an equally or more robust standard for overheating. Where there are no suitable weather files available for projected climate change, use any one of the following: To modify weather data for existing climates into the relevant future climate change scenarios required in the criteria. Alternative location Where the weather file for the nearest location for the project is not representative of the actual location’s climatic conditions, the project team can use the weather file from another nearby location which is more representative. This can take account of the climatic influences of altitude, prevailing wind, proximity to climate-moderating features, or heat island effect. 
19-May-2025 - Added example alternative format. Added links to future climate change resources.
18-Dec-2024 - Merged with KBCN1013. Scheme applicability updated.
Information correct as of 27thJune 2025. Please see kb.breeam.com for the latest compliance information.