Triple Glazed Flat Roof Window - 400 x 1500mm
TRIPLE GLAZED SKYLIGHT 400 x 1500 mm Original price was: £515.60.Current price is: £404.49. incl. VAT
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Frameless Flat Roof Window - 400 x 3000mm
TRIPLE GLAZED SKYLIGHT 400 x 3000 mm Original price was: £1,000.55.Current price is: £749.81. incl. VAT


(4 customer reviews)

Original price was: £657.00.Current price is: £467.54. incl. VAT

Prices go up when the timer hits zero.


* Glazing Type: Triple Glazed
* Internal glass size: 400 x 2000 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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19 in stock

Skylights1 Pitched Roof Skylight Blinds - 400 x 2000mm
Original price was: £673.00.Current price is: £591.70. incl. VAT
Original price was: £67.65.Current price is: £65.62. incl. VAT
£19.38 incl. VAT
£16.09 incl. VAT
Original price was: £19.90.Current price is: £19.30. incl. VAT
Weight 45 kg
Dimensions 225 × 10 × 85 cm



Saris-UK Ltd






Triple Glazed Skylight / Rooflight 400 x 2000 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 400 x 2000 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): 400 x 2000 mm
  • External Glass Size: 600 x 2200 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: 45kg
  • 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


4 reviews

4 reviews for TRIPLE GLAZED SKYLIGHT 400 x 2000 mm

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  1. Robert Johnson

    Saris Extension took care of everything from delivery to the seamless installation of our triple glazed skylight. It looks sleek and harmonious with our roof design. The wide range of sizes they offer meant that we found the perfect fit for our roof space.

  2. Laura Regan

    I recently purchased a triple glazed frameless skylight 400×2000 and I’m absolutely in love with it! The quality of the product is amazing, it looks stunning, and the delivery was incredibly fast. I’m so glad that I chose to go with Saris-Extensions as they are truly the best in the business!

  3. Richard Parks

    I was impressed by the technical team’s knowledge and their readiness to assist. They answered all my questions and guided me through the selection and installation process.

  4. Jessica Miller

    Fast and Efficient: Saris Extension’s Delivery and Installation in London! Recommend!

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