Cost of uPVC Windows and Doors
across the UK

# Trade Body Accreditation for uPVC Windows and Doors

The main UK trade bodies overseeing uPVC windows and doors include the Glass and Glazing Federation (GGF), which sets standards for the glazing industry and offers member accreditation, and the Fenestration Self-Assessment Scheme (FENSA), a government-backed competent person scheme that allows installers to self-certify their work and issue Building Regulation certificates. The British Fenestration Rating Council (BFRC) provides energy ratings for windows, helping consumers understand thermal performance. Additionally, some installers hold Trustmark accreditation, which indicates they have been vetted for quality and consumer protection. These schemes exist to protect consumers from poor workmanship, substandard materials, and unfair practices, while ensuring installations comply with Building Regulations and come with proper guarantees.

To verify a provider's credentials, ask for their membership or accreditation number and check it directly on the relevant trade body's website—FENSA members can be searched on the FENSA registry, for example. Genuine accreditation means the company has undergone vetting, agreed to follow codes of conduct, and is required to have proper insurance and dispute resolution procedures. It is important because accredited installers are bound by industry standards, must use quality materials that meet specifications, and their work is typically backed by warranties recognised across the industry. Without accreditation, you have far fewer protections if something goes wrong, and there is no independent body to turn to for complaints or redress.

Accredited providers generally charge more than non-accredited alternatives, sometimes 10 to 20 percent higher, because they invest in training, compliance, insurance, and quality assurance. However, this premium is typically worth paying because you gain peace of mind: FENSA registration means your installation is officially certified