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Fixed Flat Roof Windows

If you’re looking to invite more natural light into your home with glass windows, then you can’t go wrong with flat roof windows. Thanks to their position, this glazing element removes the barrier between the sun and your interior, resulting in fantastic light transference. As well as being extremely thermally efficient, flat roof windows also come in a variety of sizes and styles – including fixed.

If your main aim is to create a light and bright interior, then a fixed flat roof window could be the ideal solution. Perfect for areas of the home that don’t require additional ventilation, fixed flat roof windows provide a solid sheet of glass directly above your living space. Helping to make your home feel more spacious, fixed glazing is also incredibly durable and robust, with some walk-on models capable of withstanding extreme loads.


We have teamed up with some of the best brands in the glazing industry in order to offer our customers roof windows of the highest quality. We stock the full range of products from Velux, Keylite, Fakro and Mardome, four companies celebrated for their exceptional designs. Our glazing suppliers are known for producing unique and innovative windows, which is why we’re able to offer our customers a comprehensive array of models to suit all projects, needs and budgets.

These leading brands offer sleek, contemporary designs like the flat glass rooflights from Brett Martin. We supply non-opening and emergency fixed flat roof windows, laminated safety glass, and options with PVC or aluminium upstands. With a focus on innovative design and energy efficiency, our supplier range includes triple glazed and even quadruple glazed roof windows to maximise insulation and minimise heat loss. Their advanced glazing provides security and safety features as well.

By partnering with the top brands in glazing, we can supply fixed flat roof windows in a wide selection of standard and bespoke sizes to meet each customer’s specifications exactly. Our expertise in choosing only the highest quality products from Velux, Keylite, Fakro and Mardome ensures customers get the perfect flat roof windows to suit their needs.


With so many diverse styles on offer, our customers can specify a fixed flat roof window that ticks all the right boxes. Whether you’re looking for petite domed windows or a large sheet of walk-on glass, we have a model that’s right for you.

While the Keylite Flat Roof Dome Fixed Frosted window comes with patented security screw bolts and an expandable thermal collar for ultimate insulation, the Fakro DXFD U8 Secure Non-Opening Quadruple Glazed ‘Passive’ Flat-Glass Flat Roof Window features four sheets of anti-burglary glass and such excellent thermal powers that it is suitable for use in passive buildings.

No matter which fixed flat roof window you choose, you’ll be guaranteed a premium product that has been properly vetted for quality, durability and performance. Many of our models can also be installed straight from the box in minutes, allowing you to achieve the home you’ve always dreamed of in no time at all.


When you buy from Roof Window Outlet, you will be investing in a quality product from a highly respected and trustworthy source. Thanks to our partnership with the best names in the business, we are able to offer our customers a full, 10-year manufacturer’s guarantee on every single roof window. When you choose Roof Window Outlet, your home is in safe hands.

We provide fast delivery services to customers across the UK. Our wide range of flat roof windows are made from high-quality materials like glass and aluminium frames, designed for optimal thermal performance and energy efficiency. This helps reduce heat loss and energy bills.

Features like triple glazing provide extra insulation, while integrated rain sensors add weather resistance. With a choice of sizes, from standard to bespoke, we can supply flat roof windows to suit any project. Our expertise ensures customers get the right products for their needs.

Contact us today to discuss your flat roof window requirements.

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