Back to products
Flat Roof Skylight 600 x 600 mm Original price was: £ 390,00.Current price is: £ 299,00. incl. VAT

Flat Roof Skylight 500 x 500 mm

Original price was: £ 280,00.Current price is: £ 212,00. incl. VAT

12 People watching this product now!

Regal Glass Group: A trusted manufacturer of premium roof windows

Type: Fixed Frameless Flat Roof Skylight
Internal Size: 500 x500 mm
External Size: 700 x 700 mm
Glazing Type: Triple Glazed
Net Weight: 14.85kg
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 500 mm
Original price was: £ 280,00.Current price is: £ 212,00. incl. VAT
Original price was: £ 280,00.Current price is: £ 212,00. incl. VAT
£ 39,00 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 500 x 500 mm from Regal Glass Group, a testament to premium craftsmanship and innovative design in the world of skylights and skylight windows. This meticulously engineered skylight is ideal for those seeking to infuse their spaces with natural light while experiencing the pinnacle of material quality and durability.

Engineered with triple-glazed units, this skylight achieves exceptional thermal performance, boasting a U-value of 0.9 W/m²K. This is made possible by the advanced 15-millimeter warm Edge spacer, filled with Argon gas, nestled between each pane of glass to significantly reduce heat transfer and ensure your interior remains comfortable regardless of the season.

The hallmark of this skylight is the premium quality of materials used in its construction. From the high-specification glass to the frameless design, every element is chosen for its durability, performance, and ability to enhance the aesthetic appeal of your property. The frameless units not only offer a sleek, contemporary appearance but also maximize the penetration of natural daylight, creating a brighter and more welcoming environment.

Additionally, the skylight features a self-cleaning mechanism, activated by sunlight, which ensures maintenance is effortless, keeping the glass pristine and your views unobstructed.

Suitable for a variety of architectural styles, the Flat Roof Skylight 500 x 500 mm can be installed at angles ranging from 6 to 45 degrees. Beyond its aesthetic benefits, it also offers enhanced sound insulation, UV protection, and is made with safety toughened glass, adding an extra layer of security to your installation.

Fully compliant with British Standards & Building Regulations, this skylight carries all necessary Safety Markings and is CE marked, affirming its conformity with the highest EU standards for 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.


14 , 85 kg


75 × 10 × 75 cm


Regal Glass


Regal Glass Group Ltd

Internal Size

500 x 500 mm

External Size

700 x 700 mm

Glazing Type

Triple glazed

Glass Tint

Clear Tint



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

Light transmittance: tv [%]


External light refection : ρv [%]


Internal light refection : ρvi [%]


Colour rendering index : Ra [%]


Solar energy transmittance : g [%]


Shading coefcient : SC




U value

0.9 [W/(m².K)]

Sound reduction - EN 12758

[dB] 39 (-2;-7)

Roof Type

Flat Roof , Pitched Roof

Skylight Type


UV transmission : τuv [%]



2 reviews

2 reviews for Flat Roof Skylight 500 x 500 mm

Clear filters
  1. Katie Allen

    The skylight looks great in our living room. I’m happy with it.

  2. Grace Cole

    Installed a small skylight in a client’s office. They love it, very nice product.

Add a review

Your email address will not be published. Required fields are marked *

You have to be logged in to be able to add photos to your review.