We've surveyed more than 3,000 double glazing customers to find out whether big brands Safestyle, Everest and Anglian are worth spending your money on, especially when pitted against smaller brands and independents.
Our results reveal that the difference between some of the companies is vast - the top-rated firm scored nearly 30 percentage points more than the lowest-ranked.
Plus, the best firms achieve five-star ratings for customer service, installation quality and how well their products last, while one firm scored just two stars in some areas.
The two most common reasons customers told us they chose Safestyle were that it offered a discount or had particular windows or doors they liked. Our independent research reveals whether customers felt their decision paid off.
The table below shows a full breakdown of how Safestyle was rated for 15 important criteria when buying double glazing and having it fitted.
We asked customers to rate factors across sales, purchase, installation, after-sales and how well the product has lasted. These include how helpful and knowledgeable the installers were, the range of products available to choose from and value for money.
|Rating area||Safestyle's rating|
|Sales and purchase|
|How well the double glazing lasted|
Our customer score for each company allows you to easily compare each brand. And our star ratings give you even more insight into the customers' experiences on a variety of different aspects.
These additional ratings help you to see which aspects the companies are clearly struggling on, and where they stand out from the crowd.
As well as customer scores and ratings, we've also collated comments from Safestyle customers. This means you can get a true idea of what people are saying about the company.
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Flick through the images below to see some examples of the types of double glazed windows and doors that Safestyle provides, and read on to learn more about its services.
England and Wales (not Scotland or Northern Ireland).
Safestyle sells casement, sash and bay windows, all of which can be tilt-and-turn. All its frames are uPVC, but are available in a range of finishes - including white, cream, grey, black, oak and rosewood effect.
With the casement and sash windows, you can choose from a number of different configurations for the placement of the glass and frames. Decorative glass can also be used in any of the types.
You can choose from bi-fold, French and patio doors. Safestyle's uPVC doors come in the same range of finishes as its windows.
It also sells composite front and back doors, most of which include an element of glass, often decorative. These come in 11 different colours.
All of Safestyle's windows are A-rated, and its Legacy sliding sash and EcoDiamond windows are endorsed by the Energy Saving Trust.
It doesn't sell these, but Safestyle says its Eco Diamond windows and doors are recommended by the Energy Saving Trust, as they meet recommended energy performance standards.
Safestyle sells a range of conservatories and orangeries - such as P-shape, Georgian and Gable - which use its Eco Diamond glass.
There's a 10-year guarantee for replacement and repair of all faulty windows and doors. This can be transferred to new owners with no charge.
Safestyle is accredited by the Fenestration Self-Assessment Scheme and Glass and Glazing Federation, which means Safestyle installers can self-certify that the double glazing is compliant with building regulations. This saves you from having to contact your local council's building control department yourself.