GGF Mission - The GGF exists to promote its members, industry best practice and helps set the highest technical standards in Glass. The GGF is also the voice of the industry in local and national politics helping shape and influence policy and legislation. As well as offering an array of benefits to its members, the GGF guides and protects homeowners when buying glass or glazing products and services. CE Marking and Certification -The Construction Products Regulation is enforceable across the entire European Union. All construction products covered by a harmonised European Standard will need to have a Declaration of Performance made and be CE marked in accordance with the requirements of the harmonised European Norm (Hen) covering that product when placed on the market.