Flat Roof Skylight 500 x 500 mm Original price was: £ 280,00.Current price is: £ 212,00. incl. VAT
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Flat Roof Skylight 600 x 900 mm Original price was: £ 490,00.Current price is: £ 390,00. incl. VAT

Flat Roof Skylight 600 x 600 mm

Original price was: £ 390,00.Current price is: £ 299,00. incl. VAT

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Regal Glass Group: A trusted manufacturer of premium roof windows

Type: Fixed Frameless Flat Roof Skylight
Internal Size: 600 x 600 mm
External Size: 800 x 800 mm
Glazing Type: Triple Glazed
Net Weight: 20.40kg
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 600 x 600 mm
Original price was: £ 390,00.Current price is: £ 299,00. incl. VAT
Original price was: £ 390,00.Current price is: £ 299,00. incl. VAT
Original price was: £ 635,00.Current price is: £ 535,00. incl. VAT
£ 39,00 incl. VAT
£ 24,00 incl. VAT
£ 15,00 incl. VAT
£ 30,00 incl. VAT

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Easy Returns

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.

Introducing the Flat Roof Skylight 600 x 600 mm from Regal Glass Group, a masterpiece designed for those who seek to flood their spaces with daylight while ensuring complete UV protection. This square skylight combines the latest in design innovation with superior functionality, making it a perfect addition to any flat-roofed setting.

With its advanced triple-glazed units, this skylight boasts remarkable thermal efficiency, reflected in its U-value of 0.9 W/m²K. The core of its design features a 15-millimeter warm Edge spacer, filled with Argon gas, strategically placed between the panes of glass to significantly reduce heat transfer, maintaining a comfortable indoor climate all year round.

A standout feature of this skylight is its unparalleled UV protection, with a UV transmission rate of τuv [%] 0. This ensures that harmful UV rays are completely blocked, safeguarding your interior furnishings from fading and damage due to sun exposure, and providing a healthier environment by protecting occupants from UV radiation.

The frameless design of the skylight not only enhances the aesthetic appeal of your property with its sleek, contemporary look but also allows for the maximum entry of natural light, brightening your interior like never before. Furthermore, the skylight is equipped with a self-cleaning mechanism that is activated by sunlight, simplifying maintenance by keeping the glass clear and providing unobstructed views.

Versatile in its application, the Flat Roof Skylight 600 x 600 mm can be installed at pitches ranging from 6° to 45°, making it adaptable to various architectural styles. Alongside its visual and functional benefits, the skylight offers enhanced sound insulation, UV protection, and is built with safety toughened glass, ensuring durability and peace of mind.

Compliant with British Standards & Building Regulations, this skylight includes all necessary Safety Markings and is CE marked, denoting its adherence to EU quality and safety 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.


20 , 40 kg


85 × 10 × 85 cm


Regal Glass


Regal Glass Group Ltd

Internal Size

600 x 600 mm

External Size

800 x 800 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 600 x 600 mm

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  1. James Davies

    The customer service was outstanding. Lilly helped me select the perfect size skylight for my loft, and the difference it has made is incredible. Highly recommend their skylights and services.

  2. Nathan Cooper, Manchester

    Nice skylight. It was easy to fit and works well.

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