Secondary Glazing

10-year guarantee

Made in Britain

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Reduce draughts and unwanted noises and keep your home warmer without replacing your existing windows by fitting Anglian's secondary glazing. We've manufactured secondary glazing for more than 55 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.

Benefits of Secondary Glazing

  1. Noise reduction.

    By providing an additional layer of sound insulation between your home and the outside world, this will help to see a reduction in noise pollution – whether it be troublesome neighbours, street noise or early morning wildlife.

  2. Low maintenance.

    Secondary glazing is a much less disruptive solution than replacing your windows, and our slim frames need little upkeep, requiring only minimal lubrication and the occasional clean.

  3. Security.

    Secondary glazing provides an additional protective barrier against intruders. Helping to keep your home safe all year round.

  4. Cost savings.

    With a faster installation process and fewer materials involved, opting for secondary glazing is considerably more affordable than replacing all the windows in your house completely with double glazing.

  5. Keeps heat in.

    Secondary glazing is an excellent way to increase the heat retention of your home, by reducing incoming draughts and preventing warm air from escaping through your existing window.

Close up of secondary glazing seal from the Anglian secondary glazing range

Most Popular Secondary Glazing Products

Horizontal Sliding Secondary Glazing

Designed to match your existing windows, horizontal frames slide smoothly open and closed on aluminium runners, helping keep heat in, and draughts out.

Close up of white secondary glazed window from the Anglian secondary glazing range

Hinged Secondary Glazing

This option is ideal for traditional casement windows, as the secondary glazing swings open on a small hinge, in line with the mechanism of the window behind it.

Conservation property secondary glazing in white from the Anglian secondary glazing range

Vertical Sliding Secondary Glazing

Perfect for box sash windows, the panels in these vertical sliding frames move easily up, down and can tilt inwards to provide easy cleaning access to the original window.

Close up of secondary glazing on a sash window in white from the Anglian secondary glazing range

Why choose Anglian?


All our secondary glazing is covered by the Anglian 10-year guarantee. This guarantee is insured, so even if Anglian stops trading, your products will be covered.

White secondary glazing with black handles from the Anglian secondary glazing range

Made in Britain

Secondary glazing is one of the first products we started selling when Anglian began over 55 years ago. It’s manufactured right here in the UK, and fitted by our expert craftspeople.

Black secondary glazing on a window with lead bars from the Anglian secondary glazing range


Our secondary glazing is made to measure for your home. That means our prices are bespoke to each customer. We'll either end out one of our team to see you and your home to arrange a remote quotation.

Close up of period property secondary glazing from the Anglian secondary glazing range

Why Anglian?

  • Flexible finance

    Spread the cost of your secondary glazing with our low rate finance plan from 9.9% APR variable.

  • Quality guaranteed

    Your secondary glazing comes with a 10-year guarantee as standard.

  • Made in Britain

    Our secondary glazing is manufactured right here in the UK by our expert craftspeople to fit the exact specifications of your home.

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Secondary Glazing FAQs

What's the difference between double glazing and secondary glazing?

Secondary glazing is a pane of glass fitted in a separate frame on the inside of your existing windows. Double glazing is two panes of glass with the space in between filled with argon gas and vacuum-sealed inside your actual window frame.

Do you need planning permission for secondary glazing?

It’s not usually necessary to obtain planning permission for secondary glazing, even on listed buildings, as it’s invisible from the exterior of the building, and doesn’t change the primary material of the building either. If for any reason you do require planning permission, Anglian will carry out the application process for you.

Does secondary glazing add value?

Secondary glazing can add value to your home, especially if you live in a listed or period home. It can keep you warmer by reducing draughts and preserving the appearance and condition of your existing windows.

Does secondary glazing reduce condensation?

Having Anglian secondary glazing installed in your property can help reduce the condensation that gathers in your existing windows.

How do you clean between secondary glazing?

Whether you choose Anglian horizontal, vertical or hinged secondary glazing, every design is either easily tilted or removed completely to enable easy cleaning, as well as access to the original window behind it.

How long does secondary glazing last?

When properly cared for, secondary glazing can remain effective for several decades. Anglian secondary glazing is covered by our 10-year guarantee, so if you do encounter any problems with yours, you can be sure we'll be on hand to help.

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