

Flat Roof Skylight 1500 x 3000 mm, Fixed, Frameless, Triple Glazed, 266.30kg, UV 0.9
£ 3.037.00 Original price was: £ 3.037.00.£ 2.157.59Current price is: £ 2.157.59. incl. VAT
Prices go up when the timer hits zero.
Available on back-order
Skylights.co.uk: Trusted rooflights. Built to prevent leaks.
Type: Fixed Frameless Flat Roof Skylight
Internal Size: 1500 x 3000 mm
External Size: 1700 x 3200 mm
Glazing Type: Triple Glazed
Net Weight: 266.30kg
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
Thinking of adding a skylight on a flat roof but worried about heat loss? Our Flat Roof Skylight 1500 x 3000 mm boasts an impressive U-value of 0.9 W/m²K, thanks to its triple-glazed units and warm edge spacer technology. That means superior insulation, keeping your space cozy in winter and pleasantly cool in summer – all while enjoying tons of natural light!
Why Choose Our Frameless Flat Roof Windows
- Energy Efficiency: Enjoy outstanding thermal performance with triple-glazed units and warm edge spacer technology. This translates to a U-value of 0.9 W/m²K, keeping your space comfortable year-round and reducing energy bills.
- Unobstructed Views: The frameless design maximizes natural light penetration, offering breathtaking panoramic views of the sky.
- Self-Cleaning Convenience: Effortless maintenance with a sunlight-activated self-cleaning feature that keeps the glass spotless.
- Versatile Installation: Suitable for flat roofs with pitches between 6° and 45°, making it a great fit for many homes.
- Peaceful Ambiance: Provides effective soundproofing for a quieter indoor environment.
- Sun Safety: 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.
Elevate Your Flat Roof Skylight Experience
Everything you need for effortless skylights flat roof installation:
Skylight Blinds for Flat Roof Window 1500x3000mm: Achieve the perfect balance of light and privacy with these custom-designed blinds.
Installation Kit for 1 x Flat Roof Skylight 1500x3000mm: This comprehensive kit provides everything you need for a secure and stress-free installation.
Essential Accessories for Optimal Performance:
Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls): This double-duty tape offers superior sealing and crucial support for a secure skylight fit.
Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml: Create a watertight seal for lasting peace of mind with this high-performance sealant.
Self-Cleaning Liquid Smart Glass Bottle 15ml: Replenish the self-cleaning properties of your skylight with this special solution, ensuring effortless maintenance.
Choose Skylights.co.uk
We offer an extensive range of standard sizes, including the popular 3000 x 1500 mm skylight (also known as 3 x 1.5 m roof light), as well as fully custom skylights to suit your specific needs. No matter the project, our skylight flat roof provides:
- Exceptional Thermal Performance: Enjoy outstanding energy efficiency thanks to innovative features like triple glazing, keeping your space comfortable year-round.
- Natural Light Abundance: Bathe your space in beautiful natural light with our skylights, creating a brighter and more inviting atmosphere.
- Elegant Design: Add a touch of sophistication to any setting with our sleek and modern flat rooflights.
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 3000 mm Roof Lights Near Me
Looking for a 1500 x 3000 mm roof light near you? Also known as a 1.5 x 3 m large skylight, this oversized format is perfect for luxury extensions, atriums, and grand architectural spaces that demand maximum natural light. We manufacture frameless flat rooflights that deliver scale, structural integrity, and visual impact.
✅ Large Skylight – The Ultimate Daylight Feature
✅ UKCA Certified & Fully Regulation Compliant
✅ Custom-Made to Fit Any Structural Opening
✅ Secure Checkout & Trade Pricing Available
✅ Trusted by Architects, Developers & Homeowners
Designed for bold spaces and engineered to perform, this skylight offers expansive sky views, triple-glazed efficiency, and fast delivery direct from our UK factory.
Weight | 266.30 kg |
---|---|
Dimensions | 325 × 10 × 175 cm |
Internal Size |
1500 x 3000 mm |
External Size |
1700 x 3200 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
Available on back-order
12 in stock (can be backordered)
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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 3000 mm, Fixed, Frameless, Triple Glazed, 266.30kg, UV 0.9
Inclined Insulated Upstand for Flat Roof Skylight 1500 x 3000 mm


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.
Monika Baran –
Flat skylights in the kitchen make cooking more enjoyable. Great product!
Aisling McCullough –
We live in a top-floor flat in Glasgow, and the flat roof skylight has made such a huge difference. The room is always bright and full of light now.
Alicja Wojcik –
Our fixed roof windows in the bathroom were a perfect choice. The natural light is wonderful.
Gabriel Papp –
The frameless roof light in our hallway is amazing. It’s sleek, modern, and bright.
Mateusz Bialek –
Our frameless roof window in the kitchen is stylish and brings in plenty of light.
Marcel Farkas –
Fixed roof windows in our office bring in the perfect amount of light for working.
Nina Durak –
The frameless roof light in the kitchen is exactly what we needed. It’s stylish and bright.
Petra Kolar –
Flat roof windows in our hallway make the house feel open and airy.
Aneta Korzeniowska –
The fixed roof window in our hallway is sleek and makes the space look great.
Maria Ivanova –
Our frameless roof window in the hallway looks stunning. It’s sleek, modern, and bright.
Kasia Pawlak –
Our fixed roof light in the bedroom brings in a perfect amount of natural light.
Tomasz Skowronski –
The frameless roof windows in our bathroom look stylish and bring in plenty of light.
Marketa Havel –
Flat skylights in the kitchen have completely transformed it. The light is fantastic!