Flat Roof Skylight 1000 x 2500 mm, Fixed, Frameless, Triple Glazed, 123.60kgg, UV 0.9
Original price was: £ 1.209.00.£ 865.90Current price is: £ 865.90. incl. VAT
Prices go up when the timer hits zero.
14 in stock (can be backordered)
Skylights.co.uk: Trusted rooflights. Built to prevent leaks.
Type: Fixed Frameless Flat Roof Skylight
Internal Size: 1000 x 2500 mm
External Size: 1200 x 2700 mm
Glazing Type: Triple Glazed
Net Weight: 123.60kg
U Value: 0.9 W/m²K
G Value: 58%
Light transmittance : τv [%] 72
Sound reduction (EN 12758): 39dB
UV transmission : τuv [%] 0
Toughened safety & laminated 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: 6 mm Planibel Clearlite / Thermally toughened glass, compliant with BS EN 12150
- Middle Pane: 4 mm Planibel Clearlite / Thermally toughened glass, compliant with BS EN 12150
- Bottom Pane: Stratobel Clearlite 44.2 iplus 1.1 / Laminated glass with Low-E coating, compliant with EN 14449
Premium Flat Roof Skylights
Thinking about adding a skylight but worried about heat loss? Our Flat Roof Skylight 1000 x 2500 mm provides an outstanding U-value of 0.9 W/m²K, thanks to its triple-glazed units and warm edge spacer technology. This ensures excellent insulation, keeping your space warm in winter and cool in summer – all while allowing in an abundance of natural light!
Why Choose Our Frameless Flat Roof Windows
- Energy Efficiency: Benefit from excellent thermal performance with our triple-glazed units and warm edge spacer technology. This combination results in a U-value of 0.9 W/m²K, ensuring comfort throughout the year and reducing energy costs.
- Unobstructed Views: The frameless design maximizes natural light penetration, offering stunning panoramic views of the sky.
- Self-Cleaning Convenience: Enjoy low-maintenance living with a sunlight-activated self-cleaning feature that keeps your glass spotless.
- Versatile Installation: Suitable for flat roofs with pitches ranging from 6° to 45°, making it adaptable for various home styles.
- Peaceful Ambiance: Provides effective soundproofing for a quieter indoor environment.
- Sun Safety: Protects against harmful UV rays.
- Safety First: Made with safety-toughened glass for your 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 experience with these must-have accessories for seamless roof window installation and optimal performance:
- Skylight Blinds for Flat Roof Window 1000x2500mm: Control light and privacy in your space! These blinds are designed specifically for your skylight size, offering a perfect fit and allowing you to create the ideal atmosphere in your home.
- Installation Kit for 1 x Flat Roof Skylight 1000x2500mm: Everything you need for a secure and hassle-free installation. This complete kit takes the guesswork out of the process, ensuring your skylight is properly installed for optimal performance and lasting enjoyment.
- Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls): Dual-purpose during installation. This high-quality tape provides effective sealing to keep the elements out and crucial support for a secure fit.
- Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml: Essential for a watertight seal around your skylight. This durable sealant creates a weatherproof finish that keeps the elements out, ensuring your peace of mind and a comfortable indoor environment.
- Self-Cleaning Liquid Smart Glass Bottle 15ml: This special solution restores the self-cleaning properties of your skylight, ensuring effortless maintenance and sparkling glass with minimal effort on your part.
Choose Skylights.co.uk
We offer an extensive range of standard sizes, including the popular 2500 x 1000 mm skylight (also known as 2.5 x 1 m roof light), as well as fully custom skylights tailored to your specific needs. No matter the project, our flat rooflights provide:
- Natural Light Abundance: Our skylights fill your space with beautiful natural light, creating a brighter and more inviting atmosphere.
- Elegant Design: Enhance any setting with the sleek, modern design of our flat rooflights.
- Exceptional Thermal Performance: With innovative features like triple glazing, your space remains comfortable year-round.
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 1000 x 2500 mm Roof Lights Near Me
Looking for 1000 x 2500 mm roof light near you? Also known as a 1 x 2.5 m large skylight, this wide-format option is designed to transform open-plan areas, vaulted ceilings, and luxury extensions. We engineer frameless flat rooflights that offer breathtaking views, lasting durability, and smooth thermal performance.
✅ Large Skylight – Ideal for Open Living Spaces
✅ 20-Year Warranty – No Hidden Charges
✅ Installer Support Available by Phone or Email
✅ Trusted by UK Builders & Designers
✅ Custom Sizes Built to Specification
Manufactured with UKCA-certified materials and shipped nationwide, this skylight makes a bold architectural statement while enhancing energy efficiency.
| Weight | 123.60 kg |
|---|---|
| Dimensions | 275 × 10 × 125 cm |
| Internal Size |
1000 x 2500 mm |
| External Size |
1200 x 2700 mm |
| Glazing Type | |
| Glass Tint | |
| Self-Cleaning: |
Yes |
| Roof Type |
Flat Roof ,Pitched Roof |
| Skylight Type |
Frameless |
| Top Glass Pane: |
6 mm Planibel Clearlite / Thermally toughened glass EN 12150 |
| Air Gap |
16 mm Argon 90% |
| Middle Glass Pane: |
4 mm Planibel Clearlite / Thermally toughened glass |
| Air Gap |
16 mm Argon 90% |
| Bottom Glass Pane: |
Stratobel Clearlite 44.2 iplus 1.1 pos.5 / Laminated glass with Low-E coating EN 14449 |
| 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
14 in stock (can be backordered)
11 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 1000 x 2500 mm, Fixed, Frameless, Triple Glazed, 123.60kgg, UV 0.9
Original price was: £ 1.209.00.£ 805.29Current price is: £ 805.29. incl. VAT
Inclined Insulated Upstand for Flat Roof Skylight 1000 x 2500 mm
Original price was: £ 609.00.£ 450.59Current price is: £ 450.59. 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.
Ava Taylor –
We decided to go with a large 1000 x 2500 mm roof light for our loft conversion, and we couldn’t be happier. The space looks much more bright and elegant now. We live in London and got it on the next day, which was also great!
Magda Fabry –
The frameless roof light in the bathroom looks stylish and brings in a wonderful natural light.
Grace Johnson –
We’re thrilled with our 1000 x 2500 mm skylight. It’s not just a window to the sky; it’s a feature that enhances our entire home’s design.
Evie Perry –
Our 1000 x 2500 staircase skylight from Regal Glass has added a new layer of elegance and brightness to our home.
Charlotte Wilson –
The large skylight we installed above our staircase is a masterpiece. It’s amazing how it transforms a usually neglected space.
Patrick McFadden –
The flat roof skylight we installed in our Belfast home has been amazing. It brightens up the entire kitchen, and the quality is outstanding.
Peter Kuruc –
The frameless roof windows in the living room make the space feel open and stylish.
Patrik Sabol –
Flat roof windows in our kitchen make the entire house feel bright and welcoming.
Iveta Bartosova –
Our fixed roof window in the bedroom brings in the perfect amount of light. Very happy!