Pitched Roof Skylight 300 x 300 mm Original price was: £ 185,00.Current price is: £ 120,00. incl. VAT
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Pitched Roof Skylight 500 x 500 mm Original price was: £ 328,00.Current price is: £ 213,00. incl. VAT

Pitched Roof Skylight 400 x 400 mm

Original price was: £ 274,00.Current price is: £ 201,00. incl. VAT

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Regal Glass Group: A trusted manufacturer of premium roof windows

Type: Fixed Frameless Pitched Roof Skylight
Internal Size: 400 x 400 mm
External Size: 600 x 600 mm
Glazing Type: Triple Glazed
Net Weight: 10.20kg
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: Pitched Roof Skylight 400 x 400 mm
Original price was: £ 274,00.Current price is: £ 201,00. incl. VAT
Original price was: £ 274,00.Current price is: £ 201,00. incl. VAT
£ 154,00 incl. VAT
£ 154,00 incl. VAT
£ 24,00 incl. VAT
£ 115,00 incl. VAT
£ 115,00 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.

Elevate your home with the Pitched Roof Skylight 400 x 400 mm, brought to you by the experts at Regal Glass Group, where over two decades of skylight mastery meets cutting-edge design. This skylight is not just an architectural feature; it’s a transformative piece that brings the beauty of the sky right into your home, enhancing your living space with abundant natural light and a sleek aesthetic.

Regal Glass Group stands at the forefront of skylight innovation, with each Pitched Roof Skylight reflecting our unwavering commitment to quality and design excellence. Produced in-house, our skylights embody the perfect blend of functionality and elegance, ensuring that every product meets our stringent standards of perfection.

The standout feature of our Pitched Roof Skylight is its frameless, minimalist design, which effortlessly complements the aesthetic of any pitched roof. This design is not only about aesthetics; it maximizes the flow of natural light into your home, creating a brighter, more welcoming environment that enhances your well-being and the ambiance of your space.

Featuring triple-glazed units with a 15-millimeter warm Edge spacer filled with Argon gas, our Pitched Roof Skylight achieves an impressive U-value of 0.9 W/m²K. This exceptional thermal efficiency ensures that your home remains cozy and energy-efficient, maintaining a comfortable indoor temperature all year round while reducing heating and cooling costs.

Our Pitched Roof Skylights offer the ultimate in protection and low maintenance. Equipped with UV protection, they shield your interiors from the sun’s harmful rays, while the safety toughened glass ensures durability and safety. The innovative self-cleaning feature, activated by sunlight, keeps your skylight clean and clear, minimizing maintenance and ensuring an unobstructed view of the sky.

Designed with your comfort and convenience in mind, our skylights provide enhanced privacy and sound reduction, creating a peaceful, secluded haven within your home. The use of eco-friendly packaging underscores our commitment to sustainability, aligning with the preferences of eco-conscious homeowners.

The versatility of our Pitched Roof Skylight makes installation a breeze, suitable for pitches ranging from 6 to 45 degrees. With a broad selection of standard sizes readily available, we cater to a diverse array of architectural needs. Additionally, our bespoke skylight solutions offer the flexibility to create a custom feature that perfectly fits your unique specifications.

Backed by a 20-year warranty, our Pitched Roof Skylight is a testament to our confidence in its quality and longevity. Compliant with British Standards & Building Regulations and bearing the CE mark, it meets the highest standards for products sold within Europe, ensuring you receive a skylight of unparalleled quality.

Regal Glass Group’s Pitched Roof Skylight is more than just a window to the outside world; it’s a lifestyle enhancement. By blending natural light, thermal efficiency, and a minimalist design, it addresses the modern homeowner’s needs for comfort, energy savings, and aesthetic appeal. Elevate your home with our Pitched Roof Skylight and transform your living space into a haven of light and style.


10 , 20 kg


55 × 10 × 55 cm


Regal Glass



Internal Size

400 x 400 mm

External Size

600 x 600 mm

Glazing Type

Triple glazed

Glass Tint

Clear Tint



Roof Type

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 [%]


Customer Reviews

2 reviews

2 reviews for Pitched Roof Skylight 400 x 400 mm

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  1. Dylan Foster

    Went with a small skylight and it’s incredible how it’s changed the dynamics of our living space.

  2. Emily Clarke

    It’s a decent skylight. Fits well in our living room.

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