flat roof windows
flat rooflights
The smart choice for natural light, our flat roof windows are the perfect option to ensure new kitchen-diners, single-storey extensions and rear additions become bright, modern living spaces.
Manufactured in-house by Frame Fast, our flat rooflight system combines slim sightlines, concealed fixings, and U-values as low as 1.0 W/m²K. With double and triple glazing options, it provides the performance today’s homeowners demand – backed by the reliability installers need.
- Fully fabricated, ready to install
- Choose double or triple glazing
- U-Values from just 1.0 W/m²K
Supporting our customers
With more than 25 years of experience, Frame Fast collaborates closely with architects and construction professionals to ensure our windows and doors meet both aesthetic and performance requirements. We are adept at working from architectural plans and can assist during the specification stage with CAD drawings, sizing, and thermal calculations to support your project needs effectively.
unobtrusive design
Our flat rooflights feature completely concealed fixings and a discreet external profile for a clean and modern finish. The maximised glazed area allows lots of natural light into flat roof extensions.
Energy efficient
The thermally broken aluminium frame has been developed to offer optimum levels of thermal efficiency, with U-Values from just 1.0 W/m²K and accepts both double and triple glazed units.
variety of sizes
Perfect for smaller flat roof windows or wide-span flat rooflights, the system is available in sizes up to 1500 x 1500 in a square and up to 2000 x 1000 for a rectangular design application.
Simple style, Easy installation
A perfect solution for flat roof, single-storey extensions and open-plan kitchen-diners, the flat rooflight can be used to ensure maximum daylight and a greater sense of openness, without adding additional height to a new extension structure. Perfect when you have planning constraints to deal with!
The flat rooflights are available in a variety of size options, to suit different applications and can be manufactured as a square (up to 1500mm x 1500mm) or rectangle (up to 2000mm x 1500mm). There are no visible internal fixings, so the finish is clean and minimal. Externally, the unit sits low on the roof, giving a discreet profile that blends into modern or traditional designs.
The units are fully fabricated in the factory and ready to install, making things quicker and easier on site.
Visit our Trade Counter & Showrooms
Visit the Frame Fast Trade Counter and Showrooms in Derby for a warm welcome and expert advice on our glazing products. Featuring bifold doors, composite doors, windows, and more, our two showrooms are the ideal way for you to see our products firsthand. They are perfect for architects, installers, and builders looking to find the right solutions for their projects.
Got a Question? Ask an expert
We pride ourselves on delivering the highest standards of customer care, offering expert advice on technical, design, and marketing,
For further enquiries call
01332 344459
Open Mon-Thurs 8am-5pm, Fri 8am-4pm, Sat 8am-11am
Email address
info@framefastuk.com
Phone numbers
01332 344459
trade counter
Ascot Drive, Derby, DE24 8ST
contact us
Have questions or need further assistance? Then get in touch with the Frame Fast team. Whether you’re looking for advice, quotes, or more information on our products and services, we’re here to help.