Employers involved in creating the standard: The Window Company, Council for Aluminium in Building (CAB), Sunray Construction, UK Glass Force, Nationwide Windows, Eurocell, Anglian Home Improvements, Synseal/Global Glass, Rehau, Saint Gobain, Prentice Glass, Cornwall Glass & Glazing, Everest, SAS (Senior Architectural Systems), VPS Evander, Continental Installations, Comar Architectural Aluminium Systems (Parkside Group), Safestyle, Emplas Window Systems Ltd, Glazerite UK Group Limited, Corgi, GGF, Certass, Fensa