Our Flat Roof Skylights are composed of three distinct glass panes, each contributing to the unit’s durability and thermal efficiency:
- Top Pane: 6 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
- Middle Pane: 6 mm iplus Thermally toughened glass with Low-E coating EN 12150
- Bottom Pane: Stratobel Clearlite 44.2 / Laminated glass EN 14449
Premium Flat Roof Skylights
Are you considering installing a skylight but worried about heat loss? Our Flat Roof Skylight 400 x 3000 mm offers:
- An excellent U-value of 0.9 W/m²K
- Triple-glazed units for optimal insulation
- Warm edge spacer technology
This ensures your space stays warm in winter, cool in summer, and filled with natural light.
Why Choose Our Frameless Flat Roof Windows
- Thermally Efficient: Our triple-glazed units and warm edge spacer technology offer outstanding thermal performance.
- Unobstructed Views: The frameless design maximises natural light penetration and offers breathtaking sky views.
- Self-Cleaning: Effortless maintenance with a sunlight-activated self-cleaning feature keeps the glass spotless.
- Versatile Installation: Suitable for flat roofs with pitches between 6° and 45°.
- Sound Insulation: Provides effective soundproofing for a peaceful indoor environment.
- UV Protection: Offers protection against harmful UV rays.
- Safety First: Constructed with safety-toughened glass for ultimate peace of mind.
- Regulation Compliant: Meets all British Standards & Building Regulations and carries the CE safety marking.
Essential Skylight Accessories
Enhance your flat roof skylight with these must-have accessories for seamless skylight installation and peak performance:
- Skylight Blinds for Flat Roof Window 400x3000mm: Custom-fit blinds provide light control and privacy, tailored specifically for your skylight size.
- Installation Kit for 1 x Flat Roof Skylight 400x3000mm: This comprehensive kit ensures optimal performance and durability through secure, hassle-free installation.
- Foam Rope—structural Glazing Tape—9mm Thick (7.5m Rolls): This provides effective sealing and structural support during installation.
- Weatherproofing Sealant (Silicon)—DOWSIL™ 791, 310ml: This product creates a durable, weatherproof seal around your skylight, keeping the elements out.
- Self-Cleaning Liquid Smart Glass Bottle 15ml: This product replenishes the self-cleaning properties of your skylight, ensuring easy maintenance and spotless glass.
Choose Skylights.co.uk
We offer an extensive range of standard sizes, including the popular 3000 x 400 mm skylight (also known as 3 x 0.4 m roof light), as well as fully custom skylights tailored to your specific requirements. Our flat roof lights provide:
- Exceptional Thermal Performance: Triple glazing ensures superior insulation and year-round comfort.
- Natural Light Abundance: Floods your space with beautiful natural light, creating a bright and inviting atmosphere.
- Elegant Design: Sleek, modern designs that add a touch of sophistication to any setting.
Download our full product catalogue to explore our extensive range of flat roof skylights and find the perfect solution for your project. Ready to discuss your skylight needs? Contact us today!
🗺️ Where to Buy 400 x 3000 mm Flat Roof Skylights Near Me
Searching for a 400 x 3000 mm roof light near you? Also known as a 0.4 x 3 m skylight, this ultra-slim but extra-long format is made for modern extensions, skylight corridors, and bold linear designs. We supply frameless roof lights that turn ceilings into showpieces.
✅ Architectural Format – Long, Lean, and Light-Filled
✅ Built to Order with Manufacturer Pricing
✅ Installer Advice Available – We’re Here to Help
✅ 20-Year Warranty – Performance Guaranteed
✅ Fast UK Delivery with Trade Support Options
Engineered to perform under UK conditions, our skylights meet strict standards and arrive ready to install—on time and on spec.
Daniel Evans –
I am very pleased with the flat roof skylights. The quality is superior and the delivery was very fast. Highly recommended.
Grace Thomas –
The flat roof windows are of exceptional quality. The customer service is very responsive and the delivery was fast.
James Roberts –
The flat roof windows have greatly improved the lighting in our house. Very satisfied with my purchase.
Jessica Parker –
The flat roof windows are of exceptional quality. The customer service is very responsive and the delivery was fast.”
Charlie Wood –
The flat roof windows have greatly improved the lighting in our house. Very satisfied with my purchase.
Maeve Murphy –
Our frameless roof window is exactly what we wanted. It’s sleek, modern, and has brought so much light into our living room.
Ava Foster –
Our kitchen looks completely different now. The skylight lets in so much natural light, and the support team was there every step of the way. Quick delivery too!
Samuel Howard –
Great service and an excellent product. The skylight arrived quicker than we expected, and it has made a huge difference to the amount of light in our home.
Rebecca Coleman –
Amazing support team and fast dispatch. Would buy again!
Hannah Fox –
From order to delivery, the process was smooth and professional.
Emily Foster –
Installation was straightforward thanks to the technical assistance.