Flat Roof Skylight 400 x 1500 mm, Fixed, Frameless, Triple Glazed, 34kg, UV 0.9
Original price was: £ 515.00.£ 369.42Current price is: £ 369.42. incl. VAT
Prices go up when the timer hits zero.
27 in stock (can be backordered)
Skylights.co.uk: Trusted rooflights. Built to prevent leaks.
Type: Fixed Frameless Flat Roof Skylight
Internal Size: 400 x 1500 mm
External Size: 600 x 1700 mm
Glazing Type: Triple Glazed
Net Weight: 34kg
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 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 thinking about installing a skylight but worried about heat loss? Our Flat Roof Skylight measuring 400 x 1500 mm offers:
- An impressive U-value of 0.9 W/m²K
- Triple-glazed units for superior insulation
- Warm edge spacer technology
This ensures your space stays warm in winter and cool in summer while letting in abundant natural light.
Why Choose Our Frameless Flat Roof Windows
- Energy Efficiency: Our triple-glazed units and warm edge spacer technology offer exceptional thermal performance, resulting in a U-value of 0.9 W/m²K for consistent comfort and reduced energy expenses.
- Unobstructed Views: The frameless design maximizes natural light penetration and offers stunning panoramic sky views.
- Self-Cleaning Feature: Enjoy easy maintenance with a sunlight-activated self-cleaning feature that keeps your glass sparkling clean.
- Versatile Installation: It is ideal for flat roofs with pitches between 6° and 45° and fits various home styles.
- Quiet Ambiance: Effective soundproofing ensures a peaceful indoor environment.
- UV Protection: Safeguards your interior from harmful UV rays.
- Safety First: Constructed with safety-toughened glass for enhanced security.
- Regulation Compliant: Fully compliant with British Standards & Building Regulations and carries the CE safety marking.
Essential Skylight Accessories
Upgrade your flat roof skylight setup with essential accessories for smooth skylight installation and optimal performance:
- Skylight Blinds for Flat Roof Window 400x1500mm: Custom-fit blinds provide light control and privacy, tailored specifically for your skylight size.
- Installation Kit for 1 x Flat Roof Skylight 400x1500mm: This comprehensive kit ensures optimal performance and durability through secure and hassle-free installation.
- Foam Rope—Structural Glazing Tape—9mm Thick (7.5m Rolls): This product offers 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 1500 x 400 mm skylight (also known as 1.5 x 0.4 m roof light), as well as fully custom skylights tailored to your specific requirements. Our flat rooflights deliver exceptional thermal performance with innovative features like triple glazing, ensuring your space remains comfortable throughout the year. They also allow an abundance of natural light to enhance your room, creating a bright and inviting atmosphere. With sleek, modern designs, our flat rooflights 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 1500 mm Roof Lights Near Me
Looking for a 400 x 1500 mm flat roof light near you? Also known as a 0.4 x 1.5 m rooflight, this sleek, narrow format is perfect for slim corridors, internal bathrooms, or where vertical daylight detail makes an impact. We build frameless rooflights for tight spaces that still demand performance.
✅ Slimline Rooflight – For Light in Hard-to-Reach Spaces
✅ UKCA Certified – Built for Safety and Efficiency
✅ Custom Sizing Available for Unique Projects
✅ Fast, Nationwide Delivery
✅ 20-Year Structural Warranty
Ideal for both renovations and new builds, this size offers the perfect mix of subtlety and illumination—without compromising quality.
| Weight | 108 kg |
|---|---|
| Dimensions | 205 × 10 × 145 cm |
| Brand |
Skylights.co.uk |
| Internal Size |
400 x 1500 mm |
| External Size |
600 x 1700 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: |
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: |
Stratobel Clearlite 44.2 / Laminated glass |
| 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
27 in stock (can be backordered)
8 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 400 x 1500 mm, Fixed, Frameless, Triple Glazed, 34kg, UV 0.9
Original price was: £ 515.00.£ 343.56Current price is: £ 343.56. incl. VAT
Inclined Insulated Upstand for Flat Roof Skylight 400 x 1500 mm
Original price was: £ 180.00.£ 133.92Current price is: £ 133.92. 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.
Benjamin Stewart –
The bespoke skylight for our staircase from KingsView, is simply breathtaking. Highly recommend! Plus London delivery was express!
Adam Turner –
The light that floods in through our roof window has made our staircase a centerpiece in the home. Exceptional product!
Amelia wilson –
The skylight in our small kitchen has made all the difference. It’s incredible how it opens up the space. Kudos to Skylights.co.uk for their excellent work in Liverpool!
Noah Brown –
The bespoke skylight we got for our bedroom has exceeded all our expectations. The quality and service from KINGSVIEW Group are outstanding.
Rory Carter –
I never imagined how much a kitchen skylight could change our home’s ambiance. The folks at Skylights.co.uk were incredibly helpful in guiding us through the process.
Hannah Fraser –
Our kitchen feels completely transformed with the skylight. It was delivered in no time, and the installation was a breeze thanks to the helpful support team.
Tomás Doyle –
Our flat roof windows arrived quicker than expected, and they’ve made such a difference in our loft. The natural light is fantastic.
Daniel Shaw –
The skylight arrived faster than expected, and it’s made a huge difference in the amount of light in our living room. Great quality product and super helpful support.
Sheila Harris –
Super fast delivery and clear instructions for setup.