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£ 1.344.00 Original price was: £ 1.344.00.£ 1.049.00Current price is: £ 1.049.00. incl. VAT
Prices go up when the timer hits zero.
4 in stock (can be backordered)
Regal Glass Group: A trusted manufacturer of premium roof windows ✓
Leakproof Design – Tested for Maximum Weather Resistance
Type: Fixed Frameless Pitched Roof Skylight
Internal Size: 1500 x 1500 mm
External Size: 1700 x 1700 mm
Glazing Type: Triple Glazed
Net Weight: 110.85kg
U Value: 0.9 W/m²K
G Value: 58%
Light transmittance : τv [%] 72
Sound reduction (EN 12758): 39dB
UV transmission : τuv [%] 0
Roof Pitch Range: 6° to 45°
Experience the excellence of Regal Glass Group’s roof windows, featuring these impressive technical characteristics.
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4 in stock (can be backordered)
Available on back-order
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Get a Bundle with 15% Discount
Pitched Roof Skylight 1500 x 1500 mm, Fixed, Frameless, Triple Glazed, 110.85kg, UV 0.9
Insulated Upstand for Pitched Roof Skylight 1500 x 3000 mm
Installation kit for 1 x Pitched Roof Skylight 1500x1500mm (for a tiled roof)
Installation kit for 1 x Pitched Roof Skylight 1500x1500mm (for a slate roof)
Premium Pitched Roof Skylights
Immerse your space in natural light with the Regal Glass Pitched Roof Skylight 1500 x 1500 mm. This architectural marvel seamlessly blends design and functionality. Our 20+ years of expertise crafting premium skylights is evident in this product, offering year-round natural illumination and a stunning minimalist aesthetic that complements your existing roofline.
Why Choose Our Frameless Pitched Roof Windows
Unparalleled Performance:
- Exceptional Thermal Efficiency: Advanced triple-glazed units with a 15mm warm edge spacer filled with Argon gas achieve an impressive U-value of 0.9 W/m²K. Enjoy significant energy bill reductions and year-round comfort in your home.
- Unobstructed Views: The frameless design maximizes natural light penetration, offering breathtaking panoramic vistas and a sleek, minimalist aesthetic that integrates seamlessly with your pitched roof’s architecture.
- Effortless Maintenance: Enjoy spotless glass with our self-cleaning technology, activated by sunlight for minimal upkeep.
Additional Benefits:
- Versatile Installation: Suitable for roof pitches between 6° and 45°, making our Pitched Roof Skylights a great fit for many homes.
- Peaceful Ambiance: Provides effective soundproofing for a quieter indoor environment.
- Sun Safety: Offers protection against harmful UV rays, safeguarding your interiors.
- 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.
Backed by a 20-year warranty, our skylights are a testament to superior durability and performance.
Essential Pitched Roof Skylight Accessories
Enhance your pitched roof skylight experience with these essential add-ons for a seamless rooflight installation and optimal performance:
- Skylight Blinds for Pitched Roof Window 1500 x 1500 mm: Maintain complete control over light and privacy with blinds designed specifically for your skylight size.
- Installation kit for 1 x Pitched Roof Skylight 1500x1500mm (for a slate roof) or Installation kit for 1 x Pitched Roof Skylight 1500x1500mm (for a tiled roof): Everything you need for a secure and stress-free installation.
- Foam Rope – Structural Glazing Tape – 9mm Thick (7.5m Rolls): Provides both effective sealing and structural support during installation.
- Weatherproofing Sealant (Silicon) – DOWSIL™ 791, 310ml: Ensures a watertight seal around your skylight for lasting peace of mind.
- Lead Flashing Smooth 45cm x 5m Roll Grey – Easy-Trim and Lead Flashing Textured 45cm x 5m Roll Grey – Easy-Trim: BBA-certified lead replacement for pitched roof applications.
- Self-Cleaning Liquid Smart Glass Bottle 15ml: Replenishes the self-cleaning properties of your skylight for effortless maintenance.
Our Pitched 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

Choose Regal Glass Skylight Windows
We offer a variety of standard sizes readily available for purchase, along with custom skylights to suit your specific needs. No matter the project, our Pitched Roof Skylights provide:
- 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 Pitched Roof Skylights.
Download our full product catalogue to explore our extensive Pitched Roof Skylight range and find the perfect solution for your project.
Ready to discuss your skylight needs? Contact us today!
What are the benefits of Pitched Roof Skylight 1500 x 1500 mm
Regal Glass Group’s Pitched Roof Skylights 1500 x 1500 mm offer natural light and aesthetic appeal. Shop online from their website and enjoy.
🗺️ 1500 x 1500 mm Pitched Roof Lights Near Me
Looking to buy 1500 x 1500 mm pitched roof lights near you? Also known as a 1.5 x 1.5 m skylight, this bold square format is ideal for pitched roof renovations, multi-level extensions, and open-plan interiors that benefit from generous, balanced daylight. At Regal Glass Group, we produce frameless pitched roof windows that combine architectural presence with energy efficiency.
✅ Large Skylight – For Bright, Spacious Interiors
✅ Frameless Glass – Sleek, Clean Appearance
✅ Secure Checkout & Flexible Payment Options
✅ Next-Day Delivery on Stock Units
✅ 20-Year Warranty – Built to Last
Built with UKCA-compliant materials and precision-engineered for sloped installations, our skylights deliver clarity, comfort, and long-term performance—shipped nationwide from our in-house facility.
Weight | 110.85 kg |
---|---|
Dimensions | 55 × 10 × 55 cm |
Brand |
Regal Glass |
Color |
Clear |
Internal Size |
1500 x 1500 mm |
External Size |
1700 x 1700 mm |
Glazing Type | |
Glass Tint | |
Self-Cleaning: |
Yes |
Roof Type |
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 |
Delivery Times:
- Standard Size Flat & Pitched Skylights: Typically delivered within 3 to 6 working days.
- Custom Size Orders: Production and delivery to the UK take approximately 3 to 6 weeks. Delivery is free of charge.
- Roof Lanterns: Delivered within 10-14 working days from the date of order.
- Framed Skylights: Delivered within 10-14 working days from the date of order.
- Electric Opening Skylights: Delivered within 10-14 working days from the date of order.
- Walk-On Skylights: Delivered within 10-14 working days from the date of order.
- Skylight Blinds: Delivered within 10-14 working days from the date of order.
Delivery Hours:
- Monday to Friday, between 8 am and 5 pm.
Once your payment has been processed, we will contact you to arrange a convenient delivery time.
Placing an Order: To view delivery costs, please add your desired products to the cart and enter the shipping address.
Delivery Areas:
- Within London (M25): Our dedicated drivers ensure safe delivery. Please ensure that you or your builders are present to accept the delivery, as our drivers work alone and the vehicles are pre-loaded.
- Outside London (M25): We utilize an external shipping network. The courier will contact you to schedule a suitable delivery time.
- Extra Economy Shipping: Available for all areas except Northern Ireland and Scotland. In rare cases, delivery may be to a local depot if suitable vehicles are unavailable.
Important Notes:
- Many of our products are heavy, ranging from 10kg to 280kg. Depending on the size and weight, additional help may be required for unloading (2-6 people).
- We are not liable for any damage during unloading. It is the customer's responsibility to manage this process.
- If no one is present to receive the delivery, our driver will attempt to contact you via phone, text, or voicemail. If contact cannot be made, the product will be returned to our warehouse.
Why Choose Our Insulated OSB Upstands?





Before and After
See how a space is completely transformed with a Regal Glass skylight.
- Maximum daylight
- Modern minimalist design
- Superior insulation & UV protection
One change. Total transformation. Choose Regal Glass Group.
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.
Frameless Skylights Glass Performance
Experience the perfect blend of natural light, energy efficiency, noise reduction, and UV protection with our precision-engineered glass.

PITCHED ROOFS
TILE & MEMBRANE COMPATIBLE
EASY & SECURE INSTALLATION
Will It Fit My Roof?
1. Pitched Roofs
Our skylights are suitable for pitched roofs with a pitch between 6° and 45° 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.

Easy to replicate
Installation Guide
Dive into our user-friendly Installation Guide for a smooth skylight setup. Get the clarity you need, step-by-step.
Click below to explore the full guide.
Customer Reviews
5 reviews for Pitched Roof Skylight 1500 x 1500 mm, Fixed, Frameless, Triple Glazed, 110.85kg, UV 0.9
Clear filtersRelated Products
Flat Roof Skylight 300 x 300 mm, Fixed, Frameless Triple Glazed, 6.45kg, UV 0.9
Flat Roof Skylight 400 x 400 mm, Frameless Triple Glazed, 10.20kg, UV 0.9
Flat Roof Skylight 500 x 500 mm, Fixed, Frameless, Triple Glazed, 14.85kg, UV 0.9
Flat Roof Skylight 600 x 600 mm, Fixed, Frameless, Triple Glazed, 20.40kg, UV 0.9
Flat Roof Skylight 600 x 900 mm, Fixed, Frameless, Triple Glazed, 29.40kg, UV 0.9
Flat Roof Skylight 600 x 1200 mm, Fixed, Frameless, Triple Glazed, 38.40kg, UV 0.9
FAQ
Yes. This unit is designed for pitched roofs between 6° and 45° and is compatible with both tile and slate. We also supply flat roof options separately.
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, our skylights can be installed on both cold and warm roof types.
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.
Evelyn Webb –
The versatility of Regal Glass skylights allows me to recommend them for a wide range of projects. Whether it’s a small upgrade or a major renovation, they always fit the bill.
Harriet Lane –
Our medium skylight has transformed the living room into the most preferred room in the house. Can’t recommend it enough.
Callum Patel –
Just installed 2 skylights for a client in Brighton. The light and modern look has completely changed their living room. Plus, it looks new and elegant.
Jaxon Cooper –
Regal Glass’ 1500 x 1500 frameless skylight has brightened up our Edinburgh home in ways I didn’t think possible. It’s like living under the open sky. Incredible job!
Conor Chapman –
Chose a 1500×1500 mm skylight for our kitchen renovation. It’s absolutely stunning and gives us a beautiful view of the sky. Couldn’t be happier with our choice!