1200 x 2500 mm Skylight, Flat Roof, Triple Glazed, Frameless, 161.70kg, UV 0.9
Original price was: £1,870.55.£1,434.85Current price is: £1,434.85. incl. VAT
Prices go up when the timer hits zero.
Details:
The quoted skylight price excludes blinds.
No more leaks. Leakproof Rooflights from Saris-Extensions.
* Glazing Type: Triple Glazed
* Internal glass size: 1200 x 2500 mm
* U Value: 0.9 W/m²K
* G Value: 58%
* Noise-proofing value: 39 dB
* Free delivery within London (M25)
* Nationwide Delivery
* 20-Year Warranty
PDFs for Download:
Sold By Manufacturer
17 in stock
| Weight | 166 kg |
|---|---|
| Dimensions | 205 × 10 × 145 cm |
| Brand |
Saris-Extensions |
| Manufacturer |
Saris-UK Ltd |
| Color |
Clear |
| Size |
1200×2500 |
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1200 x 2500 mm Skylight, Flat Roof, Triple Glazed, Frameless, 161.70kg, UV 0.9
Original price was: £1,870.55.£1,219.62Current price is: £1,219.62. incl. VAT17 in stock
Insulated OSB Upstand 1200 x 2500 mm (for Flat roof)
Original price was: £655.00.£293.25Current price is: £293.25. incl. VAT5 in stock
Triple Glazed Skylight / Rooflight 1200 x 2500 mm
This high-performance, non-opening frameless skylight is triple glazed with 6mm toughened, self-cleaning glass and a U Value of only 0.9 W/m²K.
The internal quoted glass size is 1200 x 2500 mm, see the structural diagram below.
Our Flat Roof Skylights are composed of three distinct layers, each contributing to the unit’s durability and thermal efficiency:
Top Layer: 8 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
Middle Layer: 6 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
Bottom Layer: 6 mm iplus Thermally toughened glass with Low-E coating EN 12150
N.B. In this case, when the width exceeds one meter, it is recommended for the bottom pane of glass to be Thermally Toughened due to static reasons.
- Glazing Type: Triple Glazed
- Internal Glass Size (QUOTED): 1200 x 2500 mm
- External Glass Size: 1400 x 2700 mm
- Top Glass Pane: 8 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
- Spacer Type: 15mm Black Warm Edge
- Air Gap: 15mm 90% Argon Filled
- Middle Glass Pane: 6 mm Planibel Clearlite / Thermally toughened glass BS EN 12150
- Spacer Type: 15mm Black Warm Edge
- Air Gap: 15mm 90% Argon Filled
- Bottom Glass Pane: 6 mm iplus Thermally toughened glass with Low-E coating EN 12150
- U Value: 0.9 W/m²K
- G Value: 58%
- Net Weight: 166kg
- Self-Cleaning: YES
- UV Protected: YES
- Clear Tint
Safety and Compliance: Choosing the Right Skylight
When it comes to choosing a roof light for your home, we know that safety is an important deciding factor.
This product conforms to British Standards & Building Regulations and has all Safety Markings.
It is CE marked which is a certification mark that indicates conformity with the relevant EU directives and standards for products sold within Europe.
Our Skylights can be installed at a maximum pitch of 45 degrees.
Installation Specifications and Recommendations:
- Internal Dimensions: It's important to note that the top pane of glass includes a black border, extending the external dimensions of the unit by 200 millimetres in each direction.
- Creating the Opening: When preparing for installation, allow an additional 10 millimetres internally from upstand to upstand for proper fitting. For example, for a 600 by 900 unit, the opening should be 610 by 910 millimetres internally.
- Upstand Construction: We recommend constructing the upstand (the wooden framework housing the skylight) using two-by-one or two-by-two-inch timbers.
- Foam Rope and Sealant Use: For optimal installation, install foam rope on top of the internal supporting baton, which helps level out weight discrepancies and stress on the glass. We advise using Dowsil 791 black-coloured sealant to create a watertight perimeter around your upstand. Please note that acrylic sealants are not compatible with our units and should not be used.
Find Your Perfect Fit with Our Custom Size Skylight Calculators
Choose our skylights for a superior, clear, and comfortable living environment.
At Saris-Extensions, our Flat Roof Skylights are more than just an architectural feature; they are a fusion of advanced technology, energy efficiency, and sleek design.
Best Price 20 Years Warranty Guarantee Payment Safety Self Cleaning Clear Tint UV Protected Free Delivery within London (M25) Аll Glass Panels Safety Toughened and Laminated Glass Made In EU London Based Stock Quick and easy installation Step By Step installation guide 24/7 technical helpline| Weight | 166 kg |
|---|---|
| Dimensions | 205 × 10 × 145 cm |
| Brand |
Saris-Extensions |
| Manufacturer |
Saris-UK Ltd |
| Color |
Clear |
| Size |
1200×2500 |
Free Delivery:
- Available on all orders over £400 within the London (M25) area.
Delivery Times:
- Standard Flat & Pitched Skylights: 3–6 working days.
- Custom Sizes: 3–6 weeks for production and shipping (free delivery).
- Roof Lanterns, Framed Skylights, Electric Opening Skylights, Walk-On Skylights, Skylight Blinds: 10–14 working days.
Delivery Arrangements:
- Delivery is scheduled Monday to Friday, 8 am to 5 pm.
- We’ll contact you to arrange a delivery time once payment is complete.
Shipping Options:
- Enter your shipping address at checkout to view options.
- Within M25: Our drivers ensure safe delivery. We ask that you or your builders are present to accept the order.
- Outside M25: We use external couriers. They will contact you to schedule delivery.
- Extra Economy Shipping: Available for all areas except Northern Ireland and Scotland. In rare cases, you may need to pick up your order from a nearby depot.
Important Notes:
- Products range from 10kg to 280kg. You may need 2–6 people to assist with unloading.
- We are not liable for any damage during unloading, as it’s the customer’s responsibility.
- If no one is available to receive the delivery, we will try to contact you. If unreachable, the order will be returned to our warehouse.
Step-by-step Installation Guide
Over the years, we've observed numerous errors and poor practices in skylight installations that have led to persistent issues. To help you avoid these pitfalls, we're eager to share our accumulated expertise and knowledge. We highly recommend checking our detailed installation materials to ensure you apply the best practices for a flawless and durable installation.
Structural opening – provided By builder
When selecting sizes for our Skylights, please note that the listed dimensions correspond to the bottom (internal) glass panel. Each skylight's top panel extends an additional 100mm on each side, making the overall externally visible size 200mm larger in both width and length. This design ensures a robust, weather-resistant seal while maximizing the internal visibility and light entry of your skylight installation.
Why Professionals Trust Our Upstands
Before and After
See the remarkable difference with a Saris roof window.
- Modern, frameless elegance
- Exceptional insulation and UV protection
- U-value: 0.9 W/m²K – superior thermal performance
One simple change. A world of possibilities.
Choose Saris-Extensions.
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Frequently Asked Questions
Yes. Our triple-glazed models deliver U-values as low as 0.9 W/m²K, helping to reduce heat loss, lower energy bills, and comply with Part L Building Regulations.
Absolutely. Every unit uses toughened outer glass and laminated inner glass, ensuring excellent durability and meeting all relevant UK and EU safety standards (EN12150 / EN14449).
Yes. Designed for versatility, our rooflights fit pitched roofs between 6° and 45°, and are fully compatible with both tile and slate roofing materials. We also offer options for flat roofs.
Yes. Whether your roof is warm or cold constructed, our skylights are suitable and designed for flexible installation.
Yes — when installed using our official flashing kit and following the provided instructions, the unit is fully watertight and weather-sealed.
Yes. All models include self-cleaning glass as standard, helping to reduce dirt accumulation and maintain clear views with minimal maintenance.
Each product comes with the glazed skylight unit and installation instructions. Optional items such as flashing kits, upstands, and blinds are available to order separately.
Yes. We offer a full made-to-measure service, allowing you to order rooflights tailored to your exact dimensions. Contact us to request a custom quote.
Standard sizes are dispatched within 5–10 working days. Custom and made-to-measure orders typically take 3–5 weeks. All orders are shipped via tracked and insured delivery
Our rooflights are backed by a robust 20-year glazing guarantee, giving you complete confidence and long-term protection.
Hadly Cooper –
The triple glazed skylight I got from Saris Extension for my flat roof is top notch. I love how it maintains the indoor temperature and the extra natural light it brings in is a treat.
Tomy Scott –
These skylights are a grate for our home. Delivered promptly and the quality is unbeatable. The customer service team was knowledgeable and helped us choose the right size. Our home now feels more open and inviting. Highly recommend!
Michael Davidson –
We installed a flat roof skylight in our Durham home, and it’s been one of the best decisions. The natural light is fantastic, and it adds real value to the house.
Benjamin Murray –
We installed a flat roof skylight in our Nottingham home, and the light it provides is incredible. It’s completely changed the atmosphere of the room.
Lily McDonald –
The flat roof skylight in our Newcastle home brings in so much natural light. It’s beautifully designed and perfect for our space.
Lucas Stewart –
The flat roof skylight has transformed our house in Durham. The natural light is perfect for our open-plan kitchen, and it looks great.
Amelia Ferguson –
We love the flat roof skylight in our Edinburgh home. It lets in plenty of light and adds a modern, stylish touch to the room.
Iwan Davies –
Really happy with our frameless skylight. The extra light it brings into our living room has completely changed the space. Excellent service and quick delivery.
Lowri Evans –
The frameless roof window has made a huge difference in our home office. The light it brings in is just right.
Carys Lewis –
The flat roof windows have made our home so much brighter.