- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 15 Feb 2018
 Aim and benefits
To recognise and encourage the use of thermal insulation which has a low embodied environmental impact relative to its thermal properties.
Credits are awarded based on an insulation product's Green Guide Rating score multiplied by the thermal resistance (thermal conductivity value x volume ). Where an Environmental Product Declaration (EPD) exists, this can be used to increase the score.
 When to consider
The issue should be considered once the detailed and technical design stages commence and insulation materials are being selected i.e. RIBA Stages 3 to 4 and at a stage where the assessor/BREEAM AP are still able to influence the choice of materials used to ensure compliance.
 Step by step guidance
The design team should complete a schedule to confirm the insulation products used. The assessor can help apply any green guide ratings. This will cover all insulation used in the thermal envelope - external walls, roof and ground floor, and in the building services.
Where a product requires a bespoke green guide rating, the assessor will need to submit an Insulation Proforma to the BRE (available to assessors on BREEAM Projects under Documents - Green Guide to Specification - Assessor information).
The data provided should be input into the Mat04 Calculator Tool to confirm the Insulation Index score - 2.5 is required to gain a credit.
 Questions to ask while seeking compliance
 Tips and best practice
 Typical evidence
 Design Stage
Drawings and/or specification or completed Mat04 Schedule (example under Step by Step Guidance section. Manufacturer's data sheets. Copies of any Environmental Product Declarations (EPDs) where applicable. Print off from GreenBookLive to show green guide rating for specific product and building type where EPDs are being used.
A copy of the completed Mat04 calculator tool.
 Post Construction Stage
Written confirmation from the design team to confirm the information provided at design stage is still current or a copy of the updated Mat04 schedule. Where required, an updated copy of the Mat04 calculator tool. Where available, photos of the insulation on site could be used as evidence.
BRE Global does not endorse any of the content posted and use of the content will not guarantee the meeting of certification criteria.
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