Flat Roof Skylight 300 x 300 mm, Fixed, Frameless Triple Glazed, 6.45kg, UV 0.9
Original price was: £ 185.00.£ 106.62Current price is: £ 106.62. 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: 300 x 300 mm
External Size: 500 x 500 mm
Glazing Type: Triple Glazed
Net Weight: 6.45kg
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
Are you thinking of adding a skylight but worried about heat loss? Our Flat Roof Skylight in 300 x 300 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 cosy in winter and pleasantly cool in summer—all while enjoying tons of natural light!
Why Choose Our Frameless Flat Roof Windows
- Energy Efficiency: Triple-glazed units and warm edge spacer technology offer outstanding thermal performance, translating 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 sky views.
- Self-Cleaning Convenience: Effortless maintenance with a sunlight-activated self-cleaning feature that keeps the glass spotless.
- Versatile Installation: It is 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.
Essential Skylight Accessories
Upgrade your flat roof skylight experience with these essential add-ons for a seamless skylight installation and optimal performance:
- Installation Kit for 1 x Flat Roof Skylight 300x300mm: This complete kit includes everything you need for a secure and stress-free installation. It 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): This high-quality tape is a double threat during installation. It provides effective sealing to keep the elements at bay and crucial support for a secure fit.
- Weatherproofing Sealant (Silicon)—DOWSIL™ 791, 310ml: This durable sealant is the key to a watertight seal around your skylight. It 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 replenishes the skylight’s self-cleaning properties, ensuring effortless maintenance and sparkling glass with minimal effort.
Choose Skylights.co.uk
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 flat roof lights 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 flat roof lights.
Download our entire 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 300 x 300 mm Flat Roof Lights Near Me
Looking for a 300 x 300 mm flat skylight near you? Also known as a 0.3 x 0.3 m roof light, this compact and modern solution is perfect for brightening up smaller spaces. We manufacture sleek, frameless roof lights designed for easy installation, maximum performance, and long-lasting durability.
As a trusted UK manufacturer, we provide:
✅ Next-day delivery across the UK
✅ Custom sizes and bespoke roof light options
✅ Direct-from-manufacturer pricing
✅ Trade support and volume discounts
✅ Full UKCA certification for compliance and peace of mind
Whether you need fast-shipping stock or tailored solutions, our high-performance flat roof lights are built to meet the demands of builders, architects, and homeowners alike. We deliver nationwide, so you can order online and receive premium-quality roof lights—wherever your project is located.
| Weight | 6.45 kg |
|---|---|
| Dimensions | 55 × 10 × 55 cm |
| Internal Size |
300 x 300 mm |
| External Size |
500 x 500 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 300 x 300 mm, Fixed, Frameless Triple Glazed, 6.45kg, UV 0.9
Original price was: £ 185.00.£ 99.16Current price is: £ 99.16. incl. VAT
Inclined Insulated Upstand for Flat Roof Skylight 300 x 300 mm
Original price was: £ 119.00.£ 52.45Current price is: £ 52.45. 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.
Harry William –
I bought a small attic skylight and it has transformed my space. The natural light it brings in has turned a previously unused space into my favorite spot in the house. Huge thanks to Regal Glass for the fast shipping to Manchester and the great service!
Olivia Scott –
The small skylight in our bathroom has made a huge difference. Regal Glass Group’s products are top-notch.
Ella Jackson –
Installed a small skylight in our bathroom. It’s very good and adds nice light.
Megan Roan –
The flat roof windows have completely transformed our bedroom. The room is now flooded with natural light, and we’re so happy with the quality.
Orla McCarthy –
Our frameless roof window has transformed the attic. It’s sleek and modern, and the amount of light it brings in has made the space so much more livable.
Liam Sullivan –
Really pleased with the fixed roof window we ordered. It’s modern, stylish, and brings in a ton of natural light. Delivery was prompt.
Carys Davies –
The frameless roof window has made our living room feel so much brighter and more open. Fast delivery, and the customer service was fantastic!
Charlotte Blake –
Fast delivery and excellent technical support. The skylight has made our kitchen so much brighter!
Siobhan Gallagher –
The fixed roof window we installed in our home office has made a huge difference. The natural light is amazing, and the installation was easy.
Oliver Haines –
We installed the skylight in our loft, and the difference is incredible. It feels so much more open now. The delivery was faster than expected, and the product quality is brilliant.