British Board of Agrement
Certification body for most CWI systems

Communities and Local Government (CLG) Building Regulation pages

CWISC Competent Persons Scheme
Competent Persons Scheme operated by CIGA

Department for Business, Energy & Industrial Strategy
BEIS is a ministerial department, supported by 46 agencies and public bodies

Energy Savings Trust
Installing CWI

National Insulation Association
The definitive voice of the insulation industry