Flat Roof Skylight 1500 x 2500 mm, Fixed, Frameless, Triple Glazed, 223kg, UV 0.9
Original price was: £ 2.585.00.£ 1.910.25Current price is: £ 1.910.25. incl. VAT
Prices go up when the timer hits zero.
8 in stock (can be backordered)
Skylights.co.uk: Trusted rooflights. Built to prevent leaks.
Type: Fixed Frameless Flat Roof Skylight
Internal Size: 1500 x 2500 mm
External Size: 1700 x 2700 mm
Glazing Type: Triple Glazed
Net Weight: 223kg
U Value: 0.9 W/m²K
G Value: 58%
Light transmittance : τv [%] 72
Sound reduction (EN 12758): 39dB
UV transmission : τuv [%] 0
Toughened safety glass
Leakproof Design
Our Flat Roof Skylights are composed of three distinct glass panes, each contributing to the unit’s durability and thermal efficiency:
- Top Pane: 8 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: 8 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
Premium Flat Roof Skylights
Interested in installing a skylight but concerned about heat loss? Our Flat Roof Skylight in 1500 x 2500 mm delivers an exceptional U-value of 0.9 W/m²K, owing to its triple-glazed units and warm edge spacer technology. This provides excellent insulation, maintaining warmth in winter and coolness in summer while flooding your space with natural light.
Why Choose Our Frameless Flat Roof Windows
- Energy Efficiency: Enjoy superior thermal performance with our triple-glazed units and warm edge spacer technology, which achieve a U-value of 0.9 W/m²K for year-round comfort and lower energy bills.
- Unobstructed Views: The frameless design allows maximum natural light and provides stunning panoramic views of the sky.
- Self-Cleaning Feature: Maintain spotless glass effortlessly with a sunlight-activated self-cleaning feature.
- Versatile Installation: Suitable for flat roofs with pitches ranging from 6° to 45°, fitting a variety of home styles.
- Quiet Ambiance: Effective soundproofing ensures a peaceful indoor environment.
- UV Protection: Protects your interior from harmful UV rays.
- Safety First: Constructed with safety-toughened glass for maximum security.
- Regulation Compliant: Meets all British Standards & Building Regulations and carries the CE safety marking.
Essential Skylight Accessories
Enhance your flat roof skylight with these essential accessories for smooth and easy skylight installation and peak performance:
- Skylight Blinds for Flat Roof Window 1500x2500mm: Custom-fit blinds provide light control and privacy, perfectly tailored to your skylight size.
- Installation Kit for 1 x Flat Roof Skylight 1500x2500mm: A comprehensive kit that ensures secure and hassle-free installation for optimal performance and durability.
- Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls): Provides effective sealing and structural support during installation.
- Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml: Creates a durable, weatherproof seal around your skylight, keeping the elements out.
- Self-Cleaning Liquid Smart Glass Bottle 15ml: 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 2500 x 1500 mm skylight (also known as 2.5 x 1.5 m roof light), as well as fullyh custom roof windows tailored to your specific needs. Our flat rooflights 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 Flat Roof skylight range and find the perfect solution for your project.
Ready to discuss your skylight needs? Contact us today!
🗺️ Where to Buy 1500 x 2500 mm Roof Lights Near Me
Searching for a 1500 x 2500 mm roof light near you? Also referred to as a 1.5 x 2.5 m skylight, this format is ideal for full-width rear extensions and creative studio spaces. We deliver fixed frameless rooflights built for modern living, maximum daylight, and long-term reliability.
✅ Premium Large Skylight – Maximum Light, Minimal Framing
✅ Custom-Made to Match Structural Openings
✅ Trusted by 1,200+ UK Homeowners and Builders
✅ Installer-Friendly System with Expert Backup
✅ UKCA Certified & Regulation Compliant
Stylish, energy-efficient, and robust, our skylights arrive ready to install—designed for homes that value space, light, and clean design.
| Weight | 108 kg |
|---|---|
| Dimensions | 205 × 10 × 145 cm |
| Internal Size |
1500 x 2500 mm |
| External Size |
1700 x 2700 mm |
| Glazing Type | |
| Glass Tint | |
| Self-Cleaning: |
Yes |
| Roof Type |
Flat Roof ,Pitched Roof |
| Skylight Type |
Frameless |
| Top Glass Pane: |
8 mm Planibel Clearlite / Thermally toughened glass EN 12150 |
| Air Gap |
16 mm Argon 90% |
| Middle Glass Pane: |
6 mm iplus 1.1 pos.5 Thermally toughened glass with Low-E coating EN 12150 |
| Air Gap |
16 mm Argon 90% |
| Bottom Glass Pane: |
8 mm Planibel Clearlite / Thermally toughened glass EN 12150 |
| Spacer Type |
15mm Black Warm Edge |
| U value |
0.9 [W/(m².K)] |
| Sound reduction - EN 12758 |
[dB] 39 (-2;-7) |
| Light transmittance: tv [%] |
72 |
| External light refection : ρv [%] |
17 |
| Internal light refection : ρvi [%] |
17 |
| Colour rendering index : Ra [%] |
97 |
| Solar energy transmittance : g [%] |
57 |
| Shading coefcient : SC |
0.66 |
| Selectivity |
1.26 |
| UV transmission : τuv [%] |
0 |
Sold By Manufacturer
8 in stock (can be backordered)
15 in stock (can be backordered)
ACTIVE PROMOTION
Use Code: TODAYONLY
Transform your home with our triple-glazed flat roof skylights, maximizing natural light and thermal efficiency. Pair them with our separately sold Insulated Upstand, featuring 40mm core insulation to cut heat loss and lower energy costs.
Why Choose Our Insulated OSB Upstands?
Perfect Pitch for Water Drainage
Built-In 6° Pitch for perfect drainage
Exceptional Insulation
High Insulation with 40mm core and 15mm OSB
Ready-to-Install, Precision-Cut Fit
Factory-made to match our skylights exactly
Brighten Your Home & Save More – Bundle & Save!
Upgrade with our triple-glazed flat roof skylights for maximum light and energy efficiency.
Add the Insulated Upstand and save up to 7% with our bundle offer!
✔️ Boost thermal performance
✔️ Cut energy costs
✔️ Enjoy lasting durability
Get the complete solution at a better price – bundle today!
Get a Bundle with extra 7% Discount on Skylight and Upstand
Flat Roof Skylight 1500 x 2500 mm, Fixed, Frameless, Triple Glazed, 223kg, UV 0.9
Original price was: £ 2.585.00.£ 1.776.53Current price is: £ 1.776.53. incl. VAT
Inclined Insulated Upstand for Flat Roof Skylight 1500 x 2500 mm
Original price was: £ 450.00.£ 346.71Current price is: £ 346.71. incl. VAT
Before and After
See how a space is completely transformed with a Skylights.co.uk.
- Maximum daylight
- Modern minimalist design
- Superior insulation & UV protection
One change. Total transformation.
Our Roof Windows in Action
Photos from completed projects by our clients
Quick Shipping
Get it fast with our expedited shipping options.
Secure Payment
Shop safely with our secure online checkout.
Easy Returns
Hassle-free returns within 30 days.
20 Year Warranty
Enjoy peace of mind with our extensive warranty.
TILE & MEMBRANE COMPATIBLE
FLAT ROOFS
EASY & SECURE INSTALLATION
Will It Fit My Roof?
1. Flat Roofs
Our skylights are suitable for flat roofs with a minimum pitch of 6° when installed with the correct upstand or flashing kit.
2. Tile & Membrane Compatible
Designed for all common UK roof types – from clay tiles and slate to EPDM, GRP, and bitumen flat roof membranes.
3. Easy & Secure Installation
Each skylight is engineered for watertight, airtight installation. Use our installation kits and add our pre-fabricated upstands for a perfect fit and finish.
FAQ
Our triple-glazed models offer U-values as low as 0.9 W/m²K (whole unit), helping you meet Part L regulations and reduce heat loss.
Yes. All our skylights come with self-cleaning glass as standard to reduce dirt buildup.
Yes. We offer made-to-measure rooflights to fit your exact requirements. Contact us for a custom quote.
Yes. When installed with our official flashing kit and according to instructions, it is guaranteed to be watertight.
Absolutely. Each unit uses toughened outer and laminated inner glass that complies with UK safety standards (EN12150 / EN14449).
We offer a 20-year guarantee on the glazing unit.
William Davids –
It really adds a luxurious feel to our home.
Archie Lockwood –
The flat roof skylight has completely changed our living space. The natural light makes a huge difference!
Declan McAleer –
In Cardiff, we added a flat roof skylight to our home, and the difference is night and day. The light it brings in is simply fantastic.
Oliver Beckett –
The flat roof window is stylish and well-insulated. Our room feels bigger and brighter!
Jordan Koen –
Bright, sleek, and energy-efficient. Love it!
Charlotte Pennington –
Delivery was fast, and the rooflight is top quality. Would definitely recommend!
Daniel Atwood –
This flat rooflight exceeded our expectations! The frameless design is so elegant and modern.
Isabelle Ainsley –
Best decision ever! The rooflight is stunning.
Emily Kensington –
Easy to install, well-made, and looks fantastic in our extension. So happy with our purchase!