Modulite For Working At Height

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Keylite Roof Windows has introduced the ModuLite system, a modern alternative to traditional in-roof dormers, designed to enhance safety for contractors working at height on busy housing developments.

Unlike conventional dormers, ModuLite is a prefabricated modular system, built in a factory-controlled environment and delivered directly to site. Installers can assemble the unit at ground level before craning it into position, significantly reducing time working at height and improving overall site safety.

Developed in partnership with Keylite’s sister company Smartroof, the ModuLite system is compatible with roof pitches from 10 to 75 degrees.

It features two Keylite top hung roof windows combined with an insulated timber upstand.

More light

This design is claimed to increase natural daylight by up to 25 per cent compared to standard dormers, creating brighter, more energy-efficient interiors.

Positioned higher than a standard Keylite roof window, the ModuLite system not only provides increased headroom – an appealing feature for homeowners.

ModuLite is engineered to enhance site logistics, boost energy efficiency and deliver significant cost and time savings. A single lorry can transport up to 24 ModuLite units, substantially reducing transportation costs and site storage requirements while minimising the risk of damage in transit.

Thermal efficiency

The system’s pre-insulated design improves thermal performance, reducing heat loss and supporting the development of low-energy homes. ModuLite exceeds Part L requirements and aligns with the Future Homes Standard 2025, offering low U-values for improved energy efficiency.

Colin Wells, the head of technical at Keylite, says: “The ModuLite system has been expertly designed to deliver outstanding thermal performance and watertight protection. It provides a practical, high-performance solution for housebuilders looking to create well-ventilated, naturally bright spaces.

“With 24 units transportable on a single lorry, ModuLite helps reduce fuel consumption and optimises site logistics compared to traditional pre-assembled dormers. Plus, by assembling the unit at ground level, installers avoid unnecessary work at height, enhancing safety on site.”

Picture: Supplied as a comprehensive kit, the ModuLite system includes the insulated timber upstand, roof windows, brackets and aluminium components for integration with roof tiles, ensuring straightforward assembly for installers.

www.keyliteroofwindows.com

Article written by Cathryn Ellis
03rd July 2025

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