Flat Roof Skylight 400 x 3000 mm Original price was: £ 1.000,00.Current price is: £ 750,00. incl. VAT
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Flat Roof Skylight 500 x 3000 mm Original price was: £ 1.105,00.Current price is: £ 769,00. incl. VAT

Flat Roof Skylight 500 x 1500 mm

Original price was: £ 587,00.Current price is: £ 433,00. incl. VAT

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Regal Glass Group: A trusted manufacturer of premium roof windows

Type: Fixed Frameless Flat Roof Skylight
Internal Size: 500 x 1500 mm
External Size: 700 x 1700 mm
Glazing Type: Triple Glazed
Net Weight: 42kg
U Value: 0.9 W/m²K
G Value: 58%
Light transmittance : τv [%] 72
Sound reduction (EN 12758): 39dB
UV transmission : τuv [%] 0

Experience the excellence of Regal Glass Group’s roof windows, featuring these impressive technical characteristics.

This item: Flat Roof Skylight 500 x 1500 mm
Original price was: £ 587,00.Current price is: £ 433,00. incl. VAT
Original price was: £ 587,00.Current price is: £ 433,00. incl. VAT
Original price was: £ 685,00.Current price is: £ 585,00. incl. VAT
£ 54,00 incl. VAT
£ 24,00 incl. VAT
£ 15,00 incl. VAT
£ 30,00 incl. VAT

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Hassle-free returns within 30 days.

10 Year Warranty

Enjoy peace of mind with our extensive warranty.

Frameless Skylights Glass Performance

Experience the perfect blend of natural light, energy efficiency, noise reduction, and UV protection with our precision-engineered glass.

Modern Design
Solar energy transmittance (G value): g [%] 65
UV transmission : 0 τuv [%]
Light transmittance: τv [%] 72
Thermal transmittance (U value): : 0.9 [W/(m².K)]
Min 3.0 [W/(m².K)] / Max 0.1 [W/(m².K)] 70%
Shading coefficient: 0.66 SC
( Maximum SC 1.00 / Maximum SC 0.20 ) 42%
Sound Reduction: 39 dB (-2;-7)
( Maximum 40dB / Minimum 30dB ) 90%

Easy to replicate
Installation Guide

Dive into our user-friendly Installation Guide for a smooth skylight setup. Get the clarity you need, step-by-step.

Click below to explore the full guide.

Explore the eco-conscious and elegant Flat Roof Skylight 500 x 1500 mm, presented by Regal Glass Group, where superior design meets sustainable practices. This skylight window is an example of how functionality, aesthetics, and environmental responsibility can merge seamlessly, providing an infusion of natural light while honoring our commitment to the planet.

With its advanced triple-glazed units, this skylight achieves an impressive thermal efficiency, evidenced by a U-value of 0.9 W/m²K. This superior insulation is courtesy of the 15-millimeter warm Edge spacer, filled with Argon gas, situated between each glass pane, effectively reducing heat transfer and maintaining a comfortable interior ambiance all year round.

What sets this skylight apart is our dedication to eco-friendly packaging. We understand the importance of environmental stewardship, which is why we ensure that our skylights are packaged in sustainable materials that minimize waste and impact on the environment. This commitment extends to every aspect of our product, from the premium-quality materials used in the skylights themselves to the conscientious packaging they arrive in.

The sleek frameless design of our skylights not only enhances the visual appeal of your space but also maximizes daylight entry, brightening your interiors naturally and reducing the need for artificial lighting. This design feature, combined with the self-cleaning glass that activates with sunlight, ensures that maintenance remains minimal while your views stay clear and unobstructed.

Designed for adaptability, the Flat Roof Skylight 500 x 1500 mm can be installed with pitches from a subtle 6 degrees to a more dramatic 45 degrees, catering to a variety of roof styles. Besides its aesthetic and functional benefits, this skylight also offers sound reduction, UV protection, and is constructed with safety toughened glass for added security.

Adhering to the highest standards, this skylight complies with British Standards & Building Regulations, bears all necessary Safety Markings, and is CE marked, signifying its alignment with EU directives and quality standards.

At Regal Glass Group, we understand the importance of choice and customization. That’s why, in addition to our range of standard size skylights that are readily available in stock, we proudly offer custom skylight solutions tailored to your unique requirements. Whether you’re enhancing a residential space or illuminating a commercial venue, our skylights are designed to bring light, elegance, and efficiency to any setting.


108 kg


205 × 10 × 145 cm


Regal Glass


Regal Glass Group Ltd

Internal Size

500 x 1500 mm

External Size

700 x 1700 mm

Glazing Type

Triple glazed

Glass Tint

Clear Tint



Roof Type

Flat Roof , Pitched Roof

Skylight Type


Top Glass Pane:

6 mm Planibel Clearlite / Thermally toughened

Air Gap

16 mm Argon 90%

Middle Glass Pane:

4 mm Planibel Clearlite Thermally toughened

Air Gap

16 mm Argon 90%

Bottom Glass Pane:

Stratobel Clearlite 44.2 with iplus 1.1 pos.5

Spacer Type

15mm Black Warm Edge

U value

0.9 [W/(m².K)]

Sound reduction - EN 12758

[dB] 39 (-2;-7)

Light transmittance: tv [%]


External light refection : ρv [%]


Internal light refection : ρvi [%]


Colour rendering index : Ra [%]


Solar energy transmittance : g [%]


Shading coefcient : SC




UV transmission : τuv [%]



2 reviews

2 reviews for Flat Roof Skylight 500 x 1500 mm

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  1. Amelia Ross

    Adding a skylight to my villa in Edinburgh has been a transformative experience. The space is now flooded with natural light, making it the perfect spot to relax. Kudos to Regal Glass for such an amazing product.

  2. Noah Brown

    Opting for a 500 x 1500 mm attic skylight was the best decision for my home. The installation process was seamless, and the quality of the skylight is outstanding. Skylights.co.uk truly knows their craft!

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