Walk-On Roof Window Skylight 1000x2000 mm Original price was: £ 2.464,00.Current price is: £ 1.964,00. incl. VAT
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Pitched Roof Skylight 800 x 2500 mm Original price was: £ 819,00.Current price is: £ 769,00. incl. VAT

Flat Roof Skylight 800 x 2500 mm

Original price was: £ 829,00.Current price is: £ 769,00. incl. VAT

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Regal Glass Group: A trusted manufacturer of premium roof windows

Type: Fixed Frameless Flat Roof Skylight
Internal Size: 800 x 2500 mm
External Size: 1000 x 2700 mm
Glazing Type: Triple Glazed
Net Weight: 100.50kg
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.

Original price was: £ 779,00.Current price is: £ 679,00. incl. VAT
£ 84,00 incl. VAT
£ 24,00 incl. VAT
£ 15,00 incl. VAT
£ 30,00 incl. VAT

Payment Methods:

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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 800 x 2500 mm by Regal Glass Group, a masterpiece of daylighting solutions designed to redefine the ambiance of flat-roofed spaces. This skylight is the embodiment of architectural elegance and functional brilliance, offering an optimal influx of natural light while aligning with the highest standards of quality and performance.

This skylight window is equipped with state-of-the-art triple-glazed units, showcasing exceptional thermal insulation with a U-value of 0.9 W/m²K. Central to its superior performance is the innovative 15-millimeter warm Edge spacer, which is Argon gas-filled, strategically placed between the glass layers to substantially limit heat transfer. This design feature ensures a stable and comfortable indoor climate across varying seasons.

The hallmark of the Flat Roof Skylight 800 x 2500 mm lies in its meticulous in-house production process, overseen by the experts at Regal Glass Group. This ensures every unit meets our exacting standards for durability, aesthetics, and functionality. The frameless design of the skylight enhances the visual appeal of your space, offering an unobstructed view of the sky and maximizing the penetration of daylight to illuminate your interiors extensively.

Maintenance is made effortless with the skylight’s self-cleaning feature, which is sunlight-activated, keeping the glass spotless and maintaining clear views with little to no manual cleaning required.

The skylight’s design allows for flexible installation, accommodating roof pitches from 6° to 45°, making it a versatile choice for various architectural needs. Beyond its elegant appearance, the skylight provides effective sound insulation, protects against UV rays, and is constructed with safety toughened glass, ensuring both security and peace of mind.

Adherence to regulatory standards is paramount, and the Flat Roof Skylight 800 x 2500 mm complies with all British Standards & Building Regulations, includes all necessary Safety Markings, and carries the CE mark, affirming its conformity with EU directives and standards for product quality and safety.

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.


81 kg


225 × 10 × 105 cm


Regal Glass


Regal Glass Group Ltd

Internal Size

800 x 2500 mm

External Size

1000 x 2700 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 [%]



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