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Flat Glass Rooflight
Rated 5/5 by customers

“Simple to order, clear guidance and looks great fitted.”
From
£479.62
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections

Not sure where to start?

The Brett Martin Flat Glass Rooflight is a double glazed rooflight designed for flat roof applications where natural daylight is required. The slim aluminium frame and flat glass design provide a clean roof profile while allowing clear daylight into the space below. 

10-year warranty plus free UK mainland delivery

 

Popular Configurations

These are the configurations most customers choose
All prices displayed are exc. VAT
900 x 900 - Ral 7016 Grey
Builders upstand | Unvented | Manual | No Pole
Most popular £854.34
1000 x 1000 - Ral 7016 Grey
Builders upstand | Unvented | Fixed
Most popular £730.36
900 x 600 - Ral 7016 Grey
Builders upstand | Unvented | Fixed
Most popular £557.61

Flat Glass Rooflight

Rated 5/5 by customers

“Simple to order, clear guidance and looks great fitted.”
From
£479.62
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections
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Sorry, the combination of options you have selected is not available. Please amend your choices and try again.

Current configuration
From £479.62 ex. VAT
£575.55 inc. VAT
Secure checkout

Free mainland UK Delivery

Buy with Confidence

All product configurations are reviewed by us to ensure they’re suitable for your roof opening before production and are backed by a 10-year warranty.

Manufactured in the UK

10 year manufacturer warranty

Technical review before manufacture

Product overview

Brett Martin Flat Glass Rooflight

A premium double glazed flat glass rooflight designed to introduce natural daylight into flat roof spaces. The clean, minimalist design provides a sleek external appearance while allowing clear views of the sky from inside the building.

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Modern flat glass design Creates a clean external finish with a simple, contemporary appearance from inside and outside.
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Laminated inner pane Provides additional overhead protection by helping hold the glass together if damaged.
✓
Thermally isolated frame Powder-coated aluminium frame helps reduce heat transfer and supports thermal performance.
✓
Fixed and opening options Available in fixed, manual opening and powered opening formats depending on project requirements.

Choose your specification

Format Fixed, manual opening or powered opening flat glass rooflight.
Size Standard rectangular sizes from 600mm × 600mm up to 2000mm × 1200mm.
Frame Powder-coated aluminium frame with a slim, modern profile.
Glass unit Double glazed insulated glass unit designed for overhead glazing.
Inner pane Laminated inner pane with Low-E coating for added protection and thermal performance.
Installation Designed for installation onto a builder’s upstand or compatible PVC kerb.

Available sizes

Flat Glass Rooflights are available in a range of standard sizes designed to suit common flat roof openings, with custom sizes available for specific project requirements.

Minimum size 600mm × 600mm
Maximum standard size 2000mm × 1200mm
Custom sizes Available on request

Suitable for

Flat roof extensions
Kitchens, dining areas and living spaces
Bathrooms, hallways and utility rooms
Residential and commercial buildings
New build and refurbishment projects

Glass specification

6mm toughened outer pane Provides resistance against external impact and weather exposure.
Argon-filled cavity Helps improve the thermal performance of the insulated glass unit.
Laminated Low-E inner pane Helps reduce heat loss while providing additional overhead protection.

Ready to configure your Flat Glass Rooflight?
Select your size, opening type, kerb and ventilation options above. The price will update automatically.

Start configuring
Benefits & features

A sleek flat glass rooflight for modern daylighting

Brett Martin Flat Glass is a premium flat glass rooflight designed for flat roofs across modern residential and commercial buildings. It provides natural daylight, a clean internal finish and ventilation where specified.

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Minimalist appearance A modern flat glass design that blends neatly into the ceiling once installed.
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Thermal efficiency Thermally isolated frame and double glazing help support strong thermal performance.
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Enhanced overhead safety Laminated inner pane and non-fragility ratings provide reassurance for overhead glazing.
✓
Secure fixed models Fixed Flat Glass models hold Secured by Design accreditation.

Key benefits

Modern rooflight design Clean, stylish flat glass appearance for contemporary buildings.
Powder-coated frame Elegant aluminium frame powder coated to RAL 7016.
Low U-values Achieves U-values as low as 1.46 W/m²K depending on configuration.
Non-fragility ratings CWCT TN-67 Class 1 or 2 depending on size, and Class B non-fragile to ACR[M]001 when fully installed.
10-year warranty Supplied with a 10-year warranty for peace of mind.
EPD available BRE Globally Verified EPD available on specific configurations.

Product features

Fast delivery sizes Selected standard fixed sizes are available for fast delivery.
Kerb options Suitable for mounting to a builder’s upstand or PVC kerb in two height options.
Opening options Available in fixed, manual opening and powered opening formats.
Ventilation options Ventilation options are available depending on the rooflight configuration.
Hidden controls Powered opening rooflights include hidden actuators and cables for a clean internal appearance.
Special glass options Special glass specifications may be available on request.

Need help choosing the right Flat Glass option?
Select your size, opening format and kerb option above, or contact our team for advice.

Email our team
Write your own review
  • Only registered users can write reviews
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Flat Glass Rooflight
Simple to order, looks great fitted - job done. Chosen for our open-plan kitchen/diner because the room felt gloomy. Clear options depending on the look you’re after. Good range and the guidance helped us choose quickly. The daylight spreads really evenly across the room. Delivery updates were clear and it arrived when expected.
Jack | 2/3/2026 11:36 AM
Was this review helpful? Yes No (1/0)
A manager responded to this review
Thank you for your lovely feedback. We’re delighted to hear the ordering process was simple and that your new rooflight has made such a difference to your open-plan kitchen/diner. It’s great to know the product guidance, range of options, and delivery updates all helped make the experience smooth from start to finish. We really appreciate you taking the time to share your experience.
Installation guidance

Designed for secure installation on flat and low-pitch roofs

The Brett Martin Flat Glass Rooflight is engineered for straightforward installation onto a builder’s upstand or compatible PVC kerb. It is suitable for fixed, manual opening and powered opening formats.

✓
2° to 15° roof pitch The rooflight must be installed at a suitable pitch to allow rainwater to drain correctly.
✓
Builder’s upstand Designed to fit the outside dimension of a correctly prepared timber upstand.
✓
PVC kerb option Can also be installed with a compatible PVC kerb where specified.
✓
Fixed or opening formats Installation method varies depending on whether the rooflight is fixed, manual or powered opening.

Installation checklist

Check the roof pitch is between 2° and 15°.
Use the supplied pitch matrix to confirm the minimum pitch for the selected size.
Ensure the upstand is weathered, insulated and square before fitting.
Measure the upstand in multiple places to confirm the opening is accurate.
Follow the relevant installation guide for fixed, manual or powered opening variants.

Key measurement details

External upstand Rooflight size +40 / -20mm.
Internal upstand Rooflight size -150mm, with +30 / -0mm tolerance.
Minimum upstand height 75mm.

Important fitting note

Blinds fitted beneath the glazing can increase the risk of thermal stress. If blinds are used, choose light colours and allow suitable space and airflow between the blind and the glass.

Installation video

Watch the installation video below for a visual guide. The video should be used alongside the relevant official installation guide before fitting.

Need the full installation instructions?
Download the relevant Flat Glass installation guide from the Downloads tab before fitting.

View downloads

Brett Martin Daylight Systems operates a policy of continuous product improvement and reserves the right to alter specifications without notice. Every effort has been taken to ensure all details are correct at the time of release, but this information should be used only as a guide and does not form part of a contract or warranty. It is the customer’s responsibility to ensure the product is suitable for the actual conditions of use.

Delivery information

Flat Glass Rooflight delivery information

Standard fixed Flat Glass Rooflight sizes are available for fast delivery, while manual, powered and custom options require longer lead times. Delivery is free to standard UK mainland addresses.

1–2 working days Typical delivery time for standard fixed sizes.
Up to 5 working days Typical delivery time for manual or powered opening options.
Around 15 working days Typical delivery time for custom sizes.

How your Flat Glass Rooflight is delivered

Delivered kerbside by the Brett Martin transport fleet.
Glass and frame arrive together on a secure A-frame.
Driver can assist with unloading where safe to do so.
Sacrificial foam runners help protect the glass during unloading.
The A-frame is removed by the driver after delivery.

Delivery cost

Delivery is free to standard UK mainland addresses.

For non-mainland, remote or restricted postcode areas, please contact our team before ordering so we can confirm whether delivery can be arranged.

Important: Please ensure someone is available on the day of delivery to assist with unloading and that safe access is provided.

Important ordering information

Standard fixed sizes Fastest delivery option, typically delivered within 1–2 working days.
Opening rooflights Manual and powered opening options are typically delivered within up to 5 working days.
Custom sizes Made to order and typically delivered within approximately 15 working days.

Please double-check your order details before completing payment, as made-to-order products cannot be amended once processing begins.

Areas requiring prior arrangement

We may be unable to deliver to the following postcode areas without prior arrangement:

HS IM IV ZE BT KA27–28 KWA PA20–49 PH17–50 PO30–40 TR21–25 LL58–78

This includes Northern Ireland, the Channel Islands, remote areas and selected island or highland postcodes.

Need to check delivery to your area?
Contact our team with your postcode and product details.

Email our team

Email: info@daylightsystems.com
Phone: +44 (0)24 7660 2022

Product reviews
(1 review)
2/3/2026 11:36 AM
Flat Glass Rooflight
Simple to order, looks great fitted - job done. Chosen for our open-plan kitchen/diner because the room felt gloomy. Clear options depending on the look you’re after. Good range and the guidance helped us choose quickly. The daylight spreads really evenly across the room. Delivery updates were clear and it arrived when expected.
Jack
reply from Brett Martin
Thank you for your lovely feedback. We’re delighted to hear the ordering process was simple and that your new rooflight has made such a difference to your open-plan kitchen/diner. It’s great to know the product guidance, range of options, and delivery updates all helped make the experience smooth from start to finish. We really appreciate you taking the time to share your experience.
Was this review helpful? Yes No (1/0)
Only registered users can write reviews

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