Trade associations and Professional Bodies for uPVC Double Glazing

Assure Certification

Certass

Chartered Association of Building Engineers

Chartered Institute of Building

Double Glazing & Conservatory Ombudsman Scheme

FairTrades

Federation of Master Builders

FENSA

GGFi

Glass and Glazing Federation

Green Deal

Independent Warranty Association - IWA

ISO 9001

Kitemark

Network Veka

Norfolk Trusted Trader

OHSAS 18001

Plastics Window Federation

SAFEcontractor

Secured By Design

The Consumer Protection Guarantee

Which? Trusted Trader