Built for modern flat roofs, our triple glazed skylights deliver exceptional insulation, reduced heat loss, and reliable weather protection - achieving a high performance 0.8 W/m²K U-value.
Manufactured in the UK using toughened safety glass and premium materials, every unit is designed for long-term durability in British weather conditions.
Why Choose Our Triple Glazed Skylights?
UK Manufactured
Premium-grade materials and strict quality standards for consistent, long-term reliability.
25-Year Warranty
Industry-leading warranty giving you long-term peace of mind and confidence in your investment.
Ready in 3-7 Working Days
Fast nationwide delivery to keep your project on schedule.
Professional Fitting Available
Expert installation across London for a secure, weatherproof finish.
High-Performance Triple Glazing
Three panes with two gas-filled cavities - up to 40% more thermally efficient than double glazing.
Frameless Interior Finish
Sleek, frameless internal finish for a clean modern look with maximum natural light.
🛡 Built to Prevent Leaks - Designed for UK Weather
Our flat roof skylights are tested to withstand the toughest UK weather conditions - including heavy rain, strong winds, and temperature extremes.
- ✔ Precision-sealed triple glazing system
- ✔ Toughened safety glass (BS EN 12150 certified)
- ✔ Dual warm-edge spacers reduce condensation
- ✔ Designed to prevent water ingress
- ✔ Trusted in 700+ UK installations
📏 How to Measure Your Roof Opening
Step 1 - Measure the Structural Opening The first step in purchasing your roof-light is to measure the structural opening where the roof-light will be installed. You should allow for 5mm tolerances all around to allow the bottom pane of the roof light to fit smoothly into the opening.
As an example, if your tight opening measurements are 1010mm × 1010mm, we would recommend you purchase a rooflight with a bottom pane of 1000mm × 1000mm so it slots in smoothly.
Step 2 - Understand the Top Pane Overhang For standard units, the top pane has a black 100mm overhang all around. Using the example above, this would make the overall size of the top pane 1200mm × 1200mm.
We can increase the size of the overhang if required, for example if the up-stand width is wider.
⚠️ Important - Measure Correctly Do not measure any existing glass, outer border, or roof covering. Only measure: ✅ The structural opening (tight measurement)
If you're unsure, send us your measurements and we'll confirm the correct size before you order. Our team regularly supports homeowners, builders, and contractors with accurate sizing.
Suitable For
🍳Kitchen Extensions
🏠Rear Extensions
🌿Garden Rooms
🔨Flat Roof Renovations
🏗️New Builds
🏢Commercial Projects
Triple Glazed Unit - Glass & Build Specification
| Glazing Type |
Constructed using three high-performance glass panes bonded with dual warm edge spacer technology, delivering up to 40% greater thermal efficiency than standard double glazing and maximising insulation performance.
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Toughened Safety GlassBS EN 12150 Certified
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All three panes are manufactured using toughened safety glass - up to 5× stronger than standard glass, ensuring full compliance with overhead glazing regulations and providing maximum safety for flat roof skylight installations.
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| Argon Gas-Filled Cavities |
Two sealed cavities are filled with high-performance argon gas, significantly reducing heat transfer and improving insulation performance beyond standard double glazing - helping maintain stable indoor temperatures and reduce energy costs.
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| Low-E Thermal Coating |
Advanced Low-Emissivity (Low-E) coating reflects up to 90% of internal heat back into the room, while limiting solar heat gain in warmer months - supporting year-round thermal comfort and improved energy efficiency.
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| Dual Warm Edge Spacer Technology |
Two warm edge spacers reduce cold bridging at the glass perimeter, improving edge insulation by up to 65% and significantly reducing the risk of condensation while enhancing overall thermal performance.
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| Frameless Interior Design |
Designed with a sleek, frameless internal finish, providing a flush appearance that enhances natural daylight and complements modern flat roof and architectural glazing designs.
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| Built for UK Weather |
Engineered and tested to withstand demanding UK weather, including heavy rainfall, strong winds, and temperature fluctuations, ensuring long-term durability and reliable performance.
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Our experienced team offers professional flat roof skylight installation in and around London. We ensure your unit is correctly seated, sealed, and weatherproofed for long-term performance. Simply select Fitting Required: Yes at checkout and provide your site details.
🚚 Delivery & Postage Zones
📦 Ready in 3-7 Working Days
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Free delivery to the following postcode zones:
Free Delivery Zone HA • NW • WD • UB • TW • W • SW • EN • N
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Nationwide UK delivery available - an additional delivery charge applies for all other UK postcodes outside the zones above.
Not sure if your postcode qualifies for free delivery? Contact us before ordering and we'll confirm your delivery cost upfront.
⚠️ Important - Delivery Day Preparation Skylights are large and heavy items. Please ensure you have labourers, builders, or an extra pair of hands available and ready on the date of delivery to safely offload your unit upon arrival.
Frequently Asked Questions
Are these specifically designed for flat roofs? Yes - engineered exclusively for flat roof installations, with the correct pitch tolerance and weatherproofing for low-slope applications.
What is the difference between double and triple glazing? Double glazed units have two panes with one argon-filled cavity. Triple glazed units have three panes and two cavities - delivering up to 40% better thermal performance, ideal for very exposed or energy-critical projects.
Why choose triple glazing over double glazing? Triple glazing is the premium choice for maximum energy efficiency, noise reduction, and condensation control. It's particularly suited to exposed locations, Passivhaus-style builds, or any project where long-term energy savings are a priority.
Do you offer fitting? Yes - professional installation is available in and around London. Select the fitting option at checkout.
How quickly can I receive my order? Typical lead time is 3-7 working days from order confirmation.
Will it leak? When correctly installed to manufacturer guidelines, all units are fully weatherproof and tested for UK conditions.
Need a custom size or have a question about your project? Our team typically responds within 24 hours.
Get a Custom Quote
