All insulation material have a Green Guide rating of A or A+

Where all insulation material within the building elements external walls, ground floor, roof and building services has a Green Guide rating of A or A+ the Mat 03 Calculator would not need to be completed as the insulation index would always be 2 or greater.

Evidence would still be required as follows:

  • Marked up plans/elevations and/or a copy of the specification confirming the location of insulation materials
  • Manufacturers literature of the given product
  • The Green Guide rating and element number/bespoke green guide rating for the assessed insulation specifications.

In this instance it would not be necessary to provide the volumes and thermal conductivities of each insulation type; however, you must be satisfied that all relevant insulation has been accounted for within the assessed building.