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Flat Roof Window - 400 x 2000mm
TRIPLE GLAZED SKYLIGHT 400 x 2000 mm Original price was: £657.00.Current price is: £467.54. incl. VAT


(6 customer reviews)

Original price was: £515.60.Current price is: £404.49. incl. VAT

Prices go up when the timer hits zero.


* Glazing Type: Triple Glazed
* Internal glass size: 400 x 1500 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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21 in stock

Skylights1 Pitched Roof Skylight Blinds - 400 x 1500mm
Original price was: £630.00.Current price is: £543.20. incl. VAT
Original price was: £51.56.Current price is: £50.01. incl. VAT
£19.38 incl. VAT
£16.09 incl. VAT
Original price was: £19.90.Current price is: £19.30. incl. VAT
Weight 34 kg
Dimensions 175 × 10 × 85 cm



Saris-UK Ltd






Triple Glazed Skylight / Rooflight 400 x 1500 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 1500 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: 6mm 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 1500 mm
  • External Glass Size: 600 x 1700 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: 6mm 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: 34kg
  • 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


6 reviews

6 reviews for TRIPLE GLAZED SKYLIGHT 400 x 1500 mm

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  1. John Western

    Installing the flat roof triple glazed skylight from Saris Extension was one of the best decisions I’ve made for my home. The natural light it lets in is extraordinary and it keeps the heat in during winter months.

  2. Jim Arnolds

    You know what makes a great company? Exceptional customer service. And Saris Extension nails it! Lily and Tedi were more than helpful, and Ivo and Boyko from the technical team were so knowledgeable. I’m super pleased.

  3. Harper Brooks

    I am impressed with how quickly my skylight was delivered. The quality is top-notch and the fast shipping made the whole process even smoother.

  4. Silvester Ford

    My skylight project was a breeze, all thanks to Lilly from Saris Extension’s technical team. His expertise and advice were invaluable. I felt like I had a friend guiding me through each step.

  5. Everett Jameson

    Tedy from Saris Extension’s technical team was a godsend during my skylight project. His in-depth knowledge and patient explanations made everything so much simpler. It was like having a friend who knows everything about skylights.

  6. Josh Burns

    I’ve got to tell you about Saris Extension’s customer support team. Lily and Tedi were incredibly helpful and understanding. It was like working with a team of friends.

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