Roof Lanterns Built for Light, Height, and Lasting Performance
Bespoke roof lanterns designed, manufactured, and installed by experts. More light, more space, with zero compromises.
The Smart Way to Open Up a Flat Roof
Flat-roofed rooms often feel dark, low, and closed in. A roof lantern solves both issues by bringing in more natural light and adding vertical space.
At DuraJoin, we design, manufacture, and install bespoke roof lanterns built for long-term performance and visual impact. Every unit is made to order using durable, high-spec materials and installed by professionals who understand both the structure and the finish.
Why Choose a DuraJoin Roof Lantern?
Every project has its own challenges, but the goal is the same. More light, better space, and long-term performance. Our roof lanterns are designed to deliver all three without compromise. Here’s what you can expect:
Brighter Interiors
Every roof lantern is designed to maximise natural light, brightening darker rooms and reducing the need for artificial lighting during the day. Glazing is positioned to distribute light evenly without creating harsh glare.
Adds Volume
A raised, pitched roof lantern creates the impression of a taller ceiling and more open space. It transforms flat, boxed-in rooms into brighter, more spacious environments.
Modern Look or Traditional Match
Whether the project calls for clean, slim frames or something that blends into a heritage property, our lanterns are built to suit the style of the home with a wide range of colour and profile options.
Thermal Performance
Glazing options include low U-value double or triple units with solar control. The system is built to retain heat in winter and manage solar gain in warmer months.
Noise Reduction
Acoustic glazing options are available to reduce external noise. It is ideal for properties near roads or busy areas.
No Generic Sizes
Every unit is made to order. We don’t work off templates or fixed sizes. Measurements, pitch, frame colour, and glazing layout are all tailored to the project.
Custom Built and Designed to Fit Your Space
Every DuraJoin roof lantern is made to order. We don’t offer standard kits or one-size-fits-all models. Instead, each unit is tailored to match your exact dimensions, roof type, and design preferences.
Frame Materials: We use thermally broken aluminium for maximum strength, low maintenance, and modern sightlines. Optional timber trims are available for a softer or more traditional finish.
Glazing Options: Choose from double or triple glazing, depending on your performance requirements. We also offer self-cleaning glass, solar control coatings to manage heat gain, and laminated glazing for added safety or sound control.
Colour Customisation: Frames can be finished in any RAL colour to match existing windows or contrast with your roof. Dual-colour finishes are also available, allowing for different internal and external colours.
Opening Features: Fixed glazing is standard, but we also offer vented options for natural airflow and humidity control in kitchens or garden rooms.
Design Details: You can customise glazing bar layouts, frame pitch, and overall geometry. Whether the lantern sits over a kitchen island, dining space, or open-plan living area, we ensure it looks like it belongs there.
Built to Perform and Engineered to Last
Every DuraJoin roof lantern is built for long-term reliability in real-world conditions. We use thermally efficient glazing with low U-values to keep heat inside during colder months and prevent energy loss year-round.
Each unit is fully sealed and weather-tested to prevent cold spots, draughts, or water ingress, even on exposed or complex roofs.
Frames are finished with low-maintenance coatings designed to resist fading, corrosion, and wear over time. The entire system meets current building regulations, including Part L compliance for thermal performance. With the right design and proper installation, your roof lantern will continue to perform without issues for decades.
Our Installation Process
We handle every stage of the installation with precision and efficiency. It starts with a full site survey to confirm measurements, access, and structural suitability. If needed, we provide CAD drawings for approval before manufacture begins. Installation typically takes one to two days, depending on the roof structure and complexity.
Our team works directly with your roofer or builder to coordinate the job and avoid delays. Each roof lantern is sealed and finished on-site to ensure a watertight result. We keep the work area clean, protect your interior space, and leave without loose ends.
Planning Made Easy
Most roof lantern installations fall under Permitted Development and don’t require planning permission. We check this before the project begins. If your property is listed or in a conservation area, we’ll guide you through the process and provide any technical drawings or support needed for approval.
Frequently Asked Questions
Q: Will it leak?
A: No. When installed properly using our method, a DuraJoin roof lantern will remain watertight and secure for the long term. We use high-performance seals, correct pitch angles, and fully weather-tested components to prevent water ingress at all points. Our installers follow strict fitting standards and complete all sealing on-site to ensure a perfect finish. We also factor in your roof material, upstands, and drainage layout to make sure everything is integrated and built to last… not just look good on day one.
Q: Will it get too hot in summer?
A: Not with the right glazing. We offer solar control glass options that are specifically designed to reduce heat buildup inside the room, even during direct sunlight or warm summer days. These units help block infrared rays while still allowing natural light to flood in, keeping the space bright without overheating. You can also choose from additional coatings like low-e or self-cleaning glass depending on your location, roof orientation, and comfort preferences. We’ll advise on the best glazing setup during your design consultation.
Q: Can I add a roof lantern to my existing flat roof?
A: Yes, in most cases. As long as the structure can support the added weight and pitch of the lantern, it’s possible to retrofit one into an existing flat roof. Our team will carry out a full site survey to check structural integrity, required upstand height, and any planning or building control requirements. We also assess how the new unit will tie into your current roof system to ensure proper waterproofing and insulation. Most projects don’t require major structural changes… just smart planning and the right design.
Q: Can you match the colour of my existing windows?
A: Yes. Our roof lantern frames can be finished in any RAL colour, allowing us to match or contrast with your existing window and door systems. Dual-colour finishes are also available, meaning you can choose one colour for the exterior and another for the internal face, which is helpful for keeping the interior look clean and neutral. Whether your windows are anthracite grey, white, black, or a custom finish, we’ll make sure your roof lantern blends seamlessly with your home’s style.
Q: How long does a DuraJoin roof lantern last?
A: Our roof lanterns are built for long-term performance. With proper installation and minimal maintenance, you can expect your unit to last for several decades. The aluminium frames are powder-coated for durability and weather resistance, and the sealed glazing units are designed to maintain thermal performance over time. Unlike older or low-quality lanterns, ours are built to handle harsh weather without warping, fading, or failing at the joints. We also offer guarantees on both product and installation for added peace of mind.
Why Work with DuraJoin?
Every roof lantern we deliver is built and installed by experienced tradespeople who know the details matter. We don’t subcontract or cut corners. From your first quote to the final fix, you deal with one team, one schedule, and one accountable result.
We provide clear pricing, clean timelines, and full technical support, with no guesswork. Our work is trusted by homeowners, builders, and architects who value high standards, honest service, and long-term performance. Every unit is backed by product and installation guarantees for peace of mind that lasts well beyond the job.
Ready to Get Started?
If you’re planning a flat roof upgrade or looking to bring more light into your space, DuraJoin is ready to deliver a roof lantern that fits right and performs long term. No sales pressure. No vague estimates. Just clear advice, accurate quotes, and expert installation from start to finish.
Request your free quote today.
Email: info@durajoin.com
Call: 020 3576 2142
