When planning a home extension and looking to add some extra light “Velux” is often the first brand people mention. However, while they are excellent for traditional roof windows, a modern extension often requires and suits a flat roof skylight.
At CRL (Custom Rooflights) we manufacture high-performance rooflights for flat and pitched roofs designed for homeowners who want more natural light and a sleek architectural finish. Here is how we compare to Velux.
Superior Thermal Performance with a Triple Glazed Skylight
Energy efficiency is the biggest concern for modern builds. While Velux offers double glazing as standard, we specialize in the triple glazed skylight. Our units achieve a centre pane U-value of 0.6 W/m²K, which is significantly more efficient than standard industry alternatives. Choosing a triple-glazed option ensures your extension stays warm in the winter and cool in the summer, preventing heat loss through your roof.
Aesthetic Excellence: Choosing the Best Flat Roof Lights UK
Design matters. When homeowners search for flat roof lights uk, they are often looking for that “wow factor” found in architectural magazines. Velux flat roof windows often feature visible internal frames. In contrast, our flat roof skylights here are designed with a frameless internal finish. This creates a “sky-only” view, allowing for a seamless transition between your ceiling and the outdoors without bulky plastic or aluminium borders.
Bespoke Sizing for Your Specific Rooflights for Flat Roofs
One major drawback of standard brands is the rigid sizing. You are often forced to design your roof around the window size available. We take a different approach with our rooflights for flat roofs. While we carry over 30 stock sizes for fast delivery, we also offer a full bespoke service. We can manufacture a flat roof skylight from Korniche to your exact millimetre specifications, giving you complete architectural freedom.
Why Our Flat Roof Skylight Warranty Leads the Industry
A rooflight is a structural investment. While many competitors, including Velux, offer a standard 10-year guarantee, we go further. Because we use premium materials and advanced manufacturing for our flat roof lights uk, we offer a 20-year warranty on our triple-glazed skylights. This is double the industry standard, ensuring your home remains leak-free and thermally efficient for decades to come.
Comparison Summary
| Feature | Velux (Standard) | Custom Rooflights (Specialist) |
| Speciality | Pitched Roofs | Rooflights for Flat Roofs and Pitched Roofs |
| Glass Quality | Standard Double Glazed | Triple Glazed Skylight |
| Thermal Rating | 1.1 – 1.4 W/m²K | 0.6 W/m²K (Ultra-Efficient) |
| Interior Look | Visible Internal Frames | Frameless “Sky-Only” View |
| Warranty | 10 Years | 20 Years |
The Verdict: Which is right for you?
Choose Velux for simple, pitched-roof loft windows. However, if you are looking for the highest-performing flat roof lights uk for a modern extension—offering better insulation and a more attractive, frameless design—Custom Rooflights is the clear winner.
