Keylite's Solution

to Cold Bridging

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The real culprit in cold bridging on roof windows is not the double glazing, but it’s what happens around the frame, in the area called - The Gap.

That gap is there because all roof window manufacturers recommend a minimum of 20 millimetres around the edge to allow you to square up the opening and is actually a source of thermal bridging. On a cold day, this can actually contribute to condensation around the frame.

Keylite has taken responsibility for thermally insulating around all of our roof windows, with our unique Expanding Thermal Collar, coming as standard on every roof window we manufacture.

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The Problem

When left un-insulated, the gap in the roof allows a cold bridge through the frame, causing condensation to form on the frame which leads to ugly black mould and heat loss.

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Keylite's Solution

Only with Keylite can you get an Expanding Thermal Collar as standard in all our roof windows, at no extra cost to you. This thermal collar comes integrated into all of our roof windows and expands to fill and fully insulate that gap, meaning no condensation or cold bridging on your roof window.

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By Phone

If you would like to learn more about the gap and Keylite's solution to this, please call our Customer Service Team: 01283 200 158

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By LiveChat

We are available on LiveChat to answer any queries you may have.
Monday - Friday, 9am-5pm

By Email

We are always available via email to talk about our unique solution to the gap. Simply send an email to us:

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Service & Support

Our technical experts are on hand to advise and assist you at the design and specification stage.

Patented Innovation

Our patents mean that other conventional roof windows do not share many of our extraordinary features.

Up to 20 Year Guarantee*

We are confident that our products will give trouble free performance throughout this period and beyond. *See Guarantee terms

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Available in
Great Britain, Northern Ireland & Republic of Ireland

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