Keylite offers specifiers quality and innovative solutions

  • 5 Apr 2023

Keylite has reinvented the roof window, with its award-winning patented innovations that meet and exceed the latest relevant building regulations for new homes. This is why many of the nation’s architects, specifiers and housebuilders are choosing Keylite as their number one supplier.

Research shows up to 97% of roof windows have no proprietary thermal collar to help prevent cold bridging. Keylite prides itself on developing innovative, quality solutions, and that’s why it is the only manufacturer to offer a thermal collar as standard in all its roof windows, at no extra cost.

This feature ensures the thermal integrity of the window and roof is as designed, thus removing the reliance on an additional thermal collar, and helping achieve Approved Document L recommendations concerning thermal performance.


The patented thermal collar features in all Keylite roof windows and expands to fill and fully insulate the gap around the frame of the window to help eliminate condensation and cold bridging. It also improves airtightness, Psi Values for SAP, making it a huge hit with architects, specifiers and housebuilders across the UK and Ireland.

Part F

What’s more, Part F requirements for background ventilation have the support of Keylite’s cleverly designed top handle, allowing for controlled trickled ventilation when the window is fully closed and securely locked. NHBC will not accept other window types that provide background ventilation by being latched in the partially opened position.

Specifiers are also choosing Keylite due to its other multiple award-winning innovations. Pre-fitted flick-fit brackets enables installation in under two minutes, while sash finger spring technology allows installers to refit the sash into the frame in one easy motion. These features help contribute to a more cost-effective and efficient installation process, which housebuilders and contractors value highly.


For architects, the overall aesthetics of the core Keylite roof window range includes a traditional top handle and lower profile in the roof, which ensures a classic yet contemporary design to compliment any new home or extension project.

Keylite’s new video is advising architects, specifiers and housebuilders on how to choose a quality roof window that prevents cold bridging. Topics include thermal efficiency, solutions for new homes, technical detailing and Keylite innovations.

In addition, Keylite is offering a free CPD addressing thermal performance in roof windows. With a focus on assured thermal efficiency, the CPD will cover condensation and cold bridging, heat loss in roof windows and specification support.

To watch the video, book a CPD presentation or to upload architectural plans, visit

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