Green Double Glazing have over 40 years of combined experience within the industry and are Certass & Trustmark accredited

FENSA is the industry standard for replacement windows and doors. Installers must be self-certified in compliance with any building regulations. FENSA is a brand trusted by all local authorities, industry and government. Having a FENSA installer like Green Double Glazing means that you do not have to register your window or door installation with the local authority yourself. Not only is this approach much faster and easier; it will also save you hundreds of pounds. Furthermore, all FENSA Registered Businesses must give a guarantee or warranty for a period of ten years.

Certass are specialists in installer certification for the building fabric refurbishment industry. Within the building refurbishment market the main area that the Certass licensed scheme falls into is Glazing and Insulation. In addition, they also have a product certification scheme called the Thermal Ratings Register, which ensures the thermal compliance of replacement windows and doors that Green Double Glazing supply and install.

TrustMark is the only Government endorsed scheme for trades in and around the home. They award registered firms with their accreditation after thorough vetting and on-site inspections to ensure industry standards. At Green Double Glazing, we are TrustMark approved which means we are fully committed to working towards Government endorsed standards. This accreditation gives our customers reassurance of high quality products, good trading practices, excellent customer service and protection from rogue traders.

The Plastics Window Federation is one of the market leaders in providing quality insurance protection to customers who install windows, doors, conservatories and roofline products. Green Double Glazing are members of the Plastic Window Federation which means they are committed to working to the highest standards by offering products of confirmed quality.