Double glazing salespeople are using misleading claims and hard-sell tactics to get homeowners to sign on the dotted line, according to an investigation by Which?. The consumer organisation used undercover researchers to test the £1.2bn-a-year double glazing industry, inviting four major companies – Anglian Windows, Everest, Weatherseal Home Improvements/Zenith Staybrite and Safestyle (UK) – to [...]