For projects pursuing the one separate credit under Responsible Sourcing of Materials (where at least three of the material types listed in the material categories have been responsibly sourced), any material type which clearly accounts for less than 1 m³ per 1000 m² of gross internal floor area, can be excluded from the assessment. This applies for materials in any location or use category.
The volume considered should be taken as the construction product’s overall external dimensions, including any internal voids and air spaces. Minor fixings (brackets, nails, screws etc.), adhesives, seals and ironmongery would normally fall below this threshold.
