Pitched Roof Skylight 1200 x 2000 mm Original price was: £ 1.436,00.Current price is: £ 1.336,00. incl. VAT
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Pitched Roof Skylight 1200 x 2500 mm Original price was: £ 1.699,00.Current price is: £ 1.571,00. incl. VAT

Flat Roof Skylight 1200 x 2500 mm

Original price was: £ 1.699,00.Current price is: £ 1.571,00. incl. VAT

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Regal Glass Group: A trusted manufacturer of premium roof windows

Type: Fixed Frameless Flat Roof Skylight
Internal Size: 1200 x 2500 mm
External Size: 1400 x 2700 mm
Glazing Type: Triple Glazed
Net Weight: 161.70kg
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: £ 826,00.Current price is: £ 726,00. incl. VAT
£ 84,00 incl. VAT
£ 24,00 incl. VAT
£ 15,00 incl. VAT
£ 30,00 incl. VAT

Payment Methods:

Quick Shipping

Get it fast with our expedited shipping options.

Secure Payment

Shop safely with our secure online checkout.

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 1200 x 2500 mm by Regal Glass Group, where innovation in skylights and flat roof windows meets the assurance of enduring quality. This expansive skylight window, backed by over 20 years of expertise, not only illuminates your living space with an abundance of natural daylight but also comes with a 20-year warranty, underscoring our confidence in its performance and durability.

Crafted within our own advanced production facilities, every Flat Roof Skylight we offer is built with the finest materials, ensuring superior quality. The 1200 x 2500 mm model features a contemporary, frameless design that beautifully complements your flat roof, enhancing natural light entry and elevating the ambiance of your interiors.

The inclusion of a 20-year warranty highlights our commitment to long-term reliability and customer satisfaction. This skylight is equipped with triple-glazed units that achieve a U-value of 0.9 W/m²K, delivering exceptional thermal efficiency that maintains a comfortable indoor climate and promotes energy conservation.

Featuring self-cleaning glass technology, our skylights minimize maintenance efforts, keeping your view clear and maintenance hassle-free. Regal Glass Group provides a wide range of standard sizes, along with the option for custom skylights, ensuring you receive a product that perfectly matches your architectural vision. The Flat Roof Skylight 1200 x 2500 mm, with its focus on durability, energy efficiency, and sleek design, backed by a 20-year warranty, is an ideal choice for bringing the transformative power of natural light into your home.


108 kg


205 × 10 × 145 cm


Regal Glass


Regal Glass Group Ltd

Internal Size

1200 x 2500 mm

External Size

1400 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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