VELUX^® Window Replacement

Professional VELUX^® Window Replacement

When your existing VELUX^® window has reached the end of its life or you're looking to upgrade to a more energy-efficient model, our complete replacement service provides the perfect solution. We handle everything from removing your old window to installing and finishing your new VELUX^® window with expert precision.

Our experienced installers are trained to work with the latest VELUX^® window models, ensuring your new installation meets all current building regulations and energy efficiency standards. We can advise on the best window options for your space, whether you're looking for improved thermal performance, better sound insulation, or enhanced natural light.

The replacement process includes a thorough assessment of your existing window and roof structure, careful removal of the old unit, professional installation of the new window, and complete finishing work including flashings and internal trim. We also ensure proper disposal of your old window and provide full documentation for warranty purposes.

VELUX Window Replacement Options

Replacing an old VELUX window is an opportunity to improve insulation, reduce draughts and update the look of a room. We match the new unit to the existing structural opening whenever possible, which keeps the internal decoration intact and avoids the cost of rebuilding the reveal.

Identifying your existing window

The VELUX code is usually found on the identification plate on the top of the sash. This code tells us the size, model and glazing. Many older GGL, GGU, GHL and GPL units have direct current-generation equivalents, so the replacement can often be made without enlarging the opening.

Materials, operation and finish

• Timber interior — traditional look, painted or stained to match the room
• White polyurethane — low maintenance, durable and easy to clean
• Centre-pivot or top-hung — chosen to suit the room layout and roof pitch
• Manual, electric or solar-powered — operation to match how the room is used
• Conservation roof windows — designed to suit traditional properties and listed buildings

Flashing and roof type

The right flashing kit is essential. EDL flashing is used for slate, E-P for plain tiles, EDW for profiled roofing material up to 120 mm, and other kits for interlocking tiles and flat roofs. An insulation collar and underfelt collar are also fitted to maintain the watertight seal and thermal performance.

When to choose replacement over repair

A full replacement is the better option when the frame has failed, the window has been repaired several times, or you want to change the size, operation or finish. For glass-only problems with a sound frame, see our VELUX glass replacement service.