• Description
  • Security

Upgrade Your Existing Windows

Secondary glazing is installed on the inside of your existing windows, offering improved thermal insulation and sound reduction without the need to replace the original frames. It’s ideal for listed buildings or properties in conservation areas.

This cost-effective option helps reduce draughts, improve comfort, and lower energy bills. It also adds an extra barrier for noise and security.

Secure Your Home

Secondary glazing naturally adds another physical barrier to your windows, making it harder for intruders to gain access. It’s an easy way to strengthen older windows.

All units are built with durable materials and securely fitted, providing extra peace of mind.

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    Perfect for period properties

    If you live in a conservation area, period or listed building, you could be limited in changing your windows. Secondary glazing allows you to increase your home’s thermal insulation without affecting the exterior look. No planning permission is required, making it the perfect choice for older homes.

    The effect that secondary glazing has on your home’s warmth is the similar to double glazing. The windowpanes are slightly further apart, improving heat retention and sound insulation.

    Save on Energy Bills

    Older properties are often draughty, with poor insulation that makes them expensive to run. Secondary glazing offers a simple way to boost energy efficiency without altering your home’s appearance.

    By adding a sealed layer of protection inside your existing windows, it helps trap heat, reduce draughts, and ease the strain on your heating system. This makes your home more comfortable and more affordable to heat.

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    Visit Our Lincoln Showroom

    See our products up close at our Lincoln showroom. It’s the perfect place to explore styles, ask questions, and chat with our friendly team about what’s right for your home.

    Book an Appointment

    What Our Customers Say

    Read real reviews from happy homeowners.

    We asked Cliffside to replace our old conservatory including new foundation’s. We chose the solid roof option from Lela and had the interior plastered and...
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    John C

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    We have used cliffside for a while, they carry out all our repairs and new windows/doors on the rental properties, we have found the fitting...
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    Martin & Co Lincoln

    Via Google

    Had new windows installed, brilliant customer service they made everything very easy and quick 10/10 would recommend to everyone.

    Georgia Hancock

    Via Google

    I just had a new door with windows fitted by Cliffside Windows and extremely happy inside and out - a light-filled hallway and fantastic curb...
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    Sarah Watson

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      By submitting your details you confirm that you agree to the storing and processing of your personal data by Cliffside Windows as described in the privacy statement.

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