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Saris-Extensions Frameless Flat Roof Window - 1200 x 1800mm - Triple Glazed, Clear Tint, Toughened Safety Glass
TRIPLE GLAZED SKYLIGHT 1200 x 1800 mm Original price was: £988.90.Current price is: £797.83. incl. VAT


(8 customer reviews)

Original price was: £867.90.Current price is: £663.97. incl. VAT

Prices go up when the timer hits zero.


The quoted skylight price excludes blinds.

* Glazing Type: Triple Glazed
* Internal glass size: 600 x 1200 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

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15 in stock

Original price was: £560.00.Current price is: £395.00. incl. VAT
Skylights1 Pitched Roof Skylight Blinds - 600 x 2500mm
Original price was: £683.00.Current price is: £629.53. incl. VAT
Original price was: £67.65.Current price is: £66.98. incl. VAT
Original price was: £19.38.Current price is: £19.19. incl. VAT
Original price was: £16.09.Current price is: £15.93. incl. VAT
Original price was: £19.90.Current price is: £19.30. incl. VAT
Weight 77.40 kg
Dimensions 275 × 10 × 85 cm



Saris-UK Ltd






Triple Glazed Skylight / Rooflight 600 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 600 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: 6mm BS EN 12150 Thermally Toughened Glass

Middle Layer: 4mm BS EN 12150 Thermally Toughened Glass

Bottom Layer: 44.2 Low E;  BS EN 14449 Laminated Glass

  • Glazing Type: Triple Glazed
  • Internal Glass Size (QUOTED): 600 x 2500 mm
  • External Glass Size: 800 x 2700 mm
  • Top Glass Pane: 6mm BS EN 12150 Thermally Toughened Glass
  • Spacer Type: 15mm Black Warm Edge
  • Air Gap: 15mm 90% Argon Filled
  • Middle Glass Pane: 4mm BS EN 12150 Thermally Toughened Glass
  • Spacer Type: 15mm Black Warm Edge
  • Air Gap: 15mm 90% Argon Filled
  • Bottom Glass Pane: 44.2 Low E;  BS EN 14449 Laminated Glass
  • U Value: 0.9 W/m²K
  • G Value: 58%
  • Net Weight: 77.40 kg
  • 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


8 reviews

8 reviews for TRIPLE GLAZED SKYLIGHT 600 x 2500 mm

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  1. Lou Hardy

    Excellent service from start to finish, quick response time to queries and delivery was super prompt. Well packaged skylight and looked great quality, I had to return it due to being the wrong type for my roof situation (it was to replace an existing window) and even the return process was excellent and super helpful.

  2. Riley Homes

    Hassle-free Skylight Installation: A Saris Extension Review from a Nottingham Resident.

  3. Samuel Kelly

    I recommend Saris Extension’s skylights to all my clients now. Their easy installation and great customer support make it a breeze to work with them.

  4. Aubrey Collins

    Deciding on the perfect triple glazed skylight was a daunting task until we contacted the customer service team. They were very helpful, guiding us through the process and answering our questions. The skylight was delivered fast and we are extremely happy with the quality.Highly recommended!

  5. Olivia Simpson

    I can’t say enough good things about the triple glazed skylight from Saris Extension. It’s completely transformed the light and temperature in my flat roof home.

  6. Alexandra Edwards

    The local pickup option was extremely convenient for me. The staff was ready with my order as soon as I arrived and even helped secure everything into my vehicle. Truly top-notch service!

  7. Evie White

    The homes we’ve installed rooflights in have seen an increase in value and buyer interest. They make the home unique and add a touch of luxury that buyers are attracted to.

  8. Niamh Ernst

    Amazing skylights, delivered promptly. The customer support was excellent. The wide variety of sizes made it easy to find the right one. Our bedroom is now filled with natural light!

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