Double glazing companies rated

Double glazing

Double glazing companies rated

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Our independent survey of double glazing customers reveals which are the best brands, and how firms such as Zenith and Anglian compare.

Double glazing companies are renowned for dubious selling techniques - so it's really little wonder that only around 6% of Which? members say they trust glazing firms. 

If you’re wary of who to buy from, our 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 - as well as local independent companies and traders. 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 brand Manner of salesperson Quotation process Fitting of windows Manner of installers Quality of products Value for money After-sales service Customer score
Anglian
Everest
Independent and local builders, joiners, carpenters
Independent and local double glazing companies
Safestyle
Zenith

Table notes: Customer score combines overall satisfaction and likelihood to recommend. Sample sizes: Anglian (134), Everest (112), independent and local builders, joiners, carpenters (135), independent and local double glazing companies (2,129), Safestyle (83), Zenith (31). Survey conducted in July 2014.

Independent double glazing installers

The vast majority of Which? members have used small independent companies rather than big brands, with some citing the traders' need to maintain their strong reputations in the community as the reason for going local.

Our guide to double glazing sales and quotes will help you cut straight to the chase when companies try the hard sell, and contains tips from local installers themselves.

You can also see our guide to typical double glazing prices to find out the average cost for different sizes and types of double glazed windows and doors.

How Which? rates double glazing companies

In 2014, we asked 2,872 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. 

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.