Double Glazed Windows

You can be confident that you're installing high quality double-glazed windows when you choose Anglian. Always at the forefront of new glass and frame technology, we have 50 years’ experience behind us. That's why we're market-leading specialists with a reputation for offering our customers the best in attractive, energy-efficient windows.

white wooden cottage window
up to 40% off windows up to 40% off windows
  • 10 year guarantee
  • Established in 1966
  • Made in Britain

For almost half a century we’ve been developing and installing double glazing in houses across the UK, helping to make homes warmer and more secure. Whether you’re building a new house or replacing original windows in an older property, we’ve got a window that’s right for your home.

Our double glazed windows will not only make your home feel cosier, they’ll also give it a facelift and transform the look of the property immediately. Each of our A rated as standard double glazed windows feature two equal 4mm glass panes, separated by a 16mm cavity, which achieve excellent heat retention and deliver a high level of 31dB sound insulation. We also offer further sound reducing window options.

Our replacement windows are available in a choice of materials and styles and regardless regardless of which product you choose, all of our frames are very energy efficient, with a minimum B energy rating, surpassing the Building Regulations’ requirement of a C rating. Most of our double glazing achieves an A rating as standard and A+ rated windows are also available, which means your home could actually gain more ‘free’ heat than it loses, resulting in much lower fuel bills. If you are looking for A++ performance, our Triple glazed windows offer even higher levels of performance.

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Anglian Home Improvements Visualiser

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Choose your ideal uPVC windows, or composite/most popular uPVC front door, change the colours and furniture and see how it looks on a house type like yours.

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Why Choose Anglian?

With 95% of our customers willing to recommend us, we think there are many great reasons to choose Anglian to replace your windows. The Benefits of Anglian Glazed Windows mean that we'll guide you through the process from start to finish, offering expert guidance and quality products. We also offer lengthy guarantees that we're confident you won't need to call on.


With top-grade materials and skilled craftsmanship backed by our guarantees, you know you can rely on Anglian:

  • 10-year guarantee on uPVC, wood and aluminium
  • 5-year guarantee on stained wooden windows
  • 15-year guarantee on our Ultra gas filled units
  • Additional Glass & Glazing Federation (GGF) protection
Our guarantees

Customer Reviews

Our Accreditations

Feefo accreditation
Awarded Feefo Trusted Merchant for customer satisfaction in 2015, 2016 & 2017
British Board of Agrement windows accreditation
The British Board of Agrement provides certification on the quality of our products.
Energy Saving Trust logo
Windows with a WER rating of A or above can be registered with the Energy Saving Trust.
Trustmark logo
TrustMark is a government endorsed not-for-profit organisation that operates a quality mark framework through more than 30 scheme operators who work in the repair, maintenance and improvement sector.
Glass and Glazing Federation logo
Anglian is a leading member of the Glass and Glazing Federation (GGF).
Made in Britain logo
Certifies products made from start to finish in a British factory by British craftspeople.
The Glazing Arbitration Scheme Logo
Independent service that deals with disputes between registered businesses and consumers.

Windows FAQs

Find out more about double and triple glazing in our useful Window FAQs Section or read our articles below

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Anglian FAQs

Got questions about choosing Anglian? Find out why Anglian is the right choice for your replacement windows.

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Home Inspiration From Anglian

We're brimming with ideas on how to transform your home and garden - take a look at our "Good to be Home" online magazine for advice and tips on everything from choosing the right windows to making your home look a million dollars on a shoestring budget . It can even show you how to save money on your household bills.