Best double glazing companies Double glazing companies rated

Double glazing installer

Did independent firms fare better or worse than big names like Everest and Anglian?

Double glazing companies are renowned for dubious selling techniques - so it's really little wonder that just 7% of Which? members say they trust glazing firms. 

If you’re wary of who to buy from, our 2012 double glazing company satisfaction survey results in the table below reveal Which? customer scores for the big four national brands Anglian, Everest, Safestyle and Zenith Staybrite, as well as local independent companies. You can use our survey results to help you find a reputable installer.

Which? members can log in to unlock the results in the table below. If you're not yet a member, try Which? for £1 for instant access to this and all our independent reviews.

Double glazing satisfaction survey results
Double glazing brandManner of salespersonQuotation processInstallation of windowsQuality of productsValue for moneyCustomer serviceCustomer score
Anglian
Everest
Independents
Safestyle
Zenith Staybrite

Table notes: Customer score combines overall satisfaction and likelihood to recommend. Sample sizes: independents (2,135), Everest (156), Anglian (145), Safestyle (75), Zenith Staybrite (34).

Independent double glazing firms

The vast majority of Which? members have used small independent companies rather than big brands. One member, commenting on a local firm, said: ‘Local firms rely on word of mouth for their reputation and in a small town they cannot afford to let this slip.’

How Which? rates double glazing companies

In 2012 we asked 2,562 Which? members questions about their experience of double glazing installation and companies. All had double glazing installed in the last five years with either a local/independent firm or a big name such as Anglian, Everest, Safestyle or Zenith Staybrite. 

We asked them to rate the company they used for various aspects of their experience such as quotation process and customer service. The table above reveals satisfaction ratings and customer scores for the brands covered by our survey. 

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