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Secondary Glazing

Reduce draughts, quiet unwanted noise and keep your home warm without replacing your existing windows by fitting Anglian's secondary glazing. We've manufactured secondary double glazing for more than 50 years, and can match it to your existing windows to unobtrusively add comfort to your home. It's also perfect for listed buildings, as it won't detract from your home's traditional charm.

White uPVC triple glazed window
  • 10 year guarantee
  • Established in 1966
  • Made in Britain

If you want the benefits of double glazing, but replacing your windows isn’t an option, secondary double glazing is the perfect solution. Our secondary double glazing is a great choice because it:

  • Fits seamlessly over your existing windows
  • Helps to retain warmth
  • Improves sound insulation
  • Removes draughts from your existing windows

Secondary double-glazed windows are a great choice if you live in a listed building or conservation area where replacing windows is more difficult. They're available in a number of styles and are designed to match your existing windows, whatever the shape or size. They also offer very slim, unobtrusive sight lines on the inside and are virtually invisible on the outside.

Vertical sliding units are perfect if your home has original sliding sash windows, and they can tilt for easy cleaning. If you have horizontally-opening windows, we can install matching sliding units for between two to five casements. Or, if your home has single opening casement windows, we can make secondary double glazing to match.

Whatever the style, our secondary double-glazed windows are inconspicuous and blend in seamlessly with your home. As with every Anglian window, our secondary double glazing is bespoke and individually made by our team of skilled craftspeople to ensure you get exactly what you want.

Explore Glazing Types

Why Choose Anglian?

Our products offer superb quality and are backed by lengthy guarantees. We also support you throughout the process of replacing your windows with expert advice, fuss-free fitting and easy payment options.


We're confident that you'll enjoy your windows for many years to come, with guarantees for extra peace of mind:

  • 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
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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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