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Mardome Trade Fixed Polycarbonate Dome Rooflight
Rated 5/5 by customers

“Honestly, this has been one of the best upgrades we’ve done.”
From
£130.61
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections

Not sure where to start?

The Mardome Trade Fixed Polycarbonate Dome Rooflight is available from 450mm to 2400mm in length and 450mm to 1800mm in width, providing a durable and cost-effective flat roof dome solution for high-performance natural daylight.

10-year warranty plus free UK mainland delivery.

 

Mardome Trade Fixed Polycarbonate Dome Rooflight

Rated 5/5 by customers

“Honestly, this has been one of the best upgrades we’ve done.”
From
£130.61
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections
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Current configuration
From £130.61 ex. VAT
£156.74 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

Mardome Trade Fixed Polycarbonate Dome Rooflight

A durable, cost-effective fixed polycarbonate rooflight for flat roof spaces where reliable daylight, weather performance and practical installation are required. Available in multiple sizes, glazing options, tints and kerb configurations.

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Durable polycarbonate glazing Impact-resistant polycarbonate provides a robust alternative to glass for flat roof applications.
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Wide choice of sizes Available in square and rectangular sizes from 450mm up to 2400mm depending on configuration.
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Flexible specification Choose glazing skin, tint, shape, kerb and ventilation options to suit the project.
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Fast mainland delivery Standard Trade Fixed rooflights are typically delivered within 1–2 working days.

Choose your specification

Glazing Single, double, triple or quad skin polycarbonate.
Tint Clear, opal or patterned finish depending on daylight and privacy needs.
Shape Low rise dome or low rise pyramid profile.
Kerb Builder’s upstand, 150mm PVC kerb or 300mm PVC kerb.
Opening Fixed rooflight configuration.
Ventilation Unvented or manual trickle vent option.

Available sizes

Available in square and rectangular sizes from 450mm × 450mm up to 2400mm × 1800mm, suitable for small rooms, extensions and larger commercial flat roof applications.

Minimum size 450mm × 450mm
Maximum size 2400mm × 1800mm
Shape formats Square and rectangular

Suitable for

Flat roof home extensions
Kitchens, living spaces and utility rooms
Commercial and industrial buildings
Schools, healthcare and public buildings
New build and refurbishment projects

Ready to configure your rooflight?
Select your size, glazing, tint and kerb options above. The price will update automatically.

Start configuring
Installation guidance

Designed for secure installation on flat and low-pitch roofs

The Mardome Trade Fixed Polycarbonate Rooflight can be installed onto a prepared builder’s upstand or supplied with a PVC kerb, depending on the project and site requirements.

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Builder’s upstand For projects where a suitable structural, insulated and weathered upstand has already been prepared.
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150mm PVC kerb A practical option where integrated waterproofing height is required.
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300mm PVC kerb A higher kerb option for projects requiring additional upstand height.
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Manual trickle vents Available where background ventilation is required while keeping the rooflight fixed.

Installation checklist

Check the roof opening is square, clean and ready before installation.
Ensure the upstand is correctly dimensioned, insulated and weathered.
Install the glazing with the UV-resistant layer facing upwards, as marked.
Follow the official installation guide for fixing, sealing and finishing requirements.

Important fitting note

Avoid placing blinds directly below the glazing. If blinds are used, choose light-coloured blinds and position them away from the rooflight to help reduce the risk of thermal stress.

Minimum upstand height and roof pitch requirements should always be checked against the official installation guide and relevant building regulations.

Installation video

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

Need the full installation instructions?
Download the official installation guide before fitting the rooflight.

Download installation guide

Brett Martin Daylight Systems operates a policy of continuous product improvement and reserves the right to alter specifications without notice. Installation information should be used as a guide only. It is the customer’s responsibility to ensure the product is suitable for the actual conditions of use.

Delivery information

Fast delivery for standard Trade Fixed rooflights

Standard Mardome Trade Fixed Polycarbonate Rooflights are typically delivered within 1–2 working days, with free delivery available to UK mainland addresses.

1–2 working days Typical delivery time for standard Trade Fixed rooflights.
Free mainland delivery Available to UK mainland addresses.
12 noon cut-off Monday to Friday orders placed before 12 noon are prioritised.

How your rooflight is delivered

Delivered kerbside by the Brett Martin transport fleet or an approved delivery partner.
Someone should be available on the day of delivery to receive and move the rooflight safely.
Goods should be checked on arrival and any visible damage reported as soon as possible.

Delivery cost

Delivery is free to UK mainland addresses.

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

Important: Delivery requirements can vary by postcode, product size and site access. Contact us before ordering if you are unsure.

Areas requiring prior arrangement

We may be unable to deliver to the following 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

Write your own review
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Polycarbonate Rooflight
Honestly, this has been one of the best upgrades we’ve done.
Chloe | 2/27/2026 11:13 AM
Was this review helpful? Yes No (1/0)
A manager responded to this review
Thank you for your review. We’re so pleased to hear this has been one of the best upgrades you’ve made. We really appreciate your feedback and your custom.
Product reviews
(1 review)
2/27/2026 11:13 AM
Polycarbonate Rooflight
Honestly, this has been one of the best upgrades we’ve done.
Chloe
reply from Brett Martin
Thank you for your review. We’re so pleased to hear this has been one of the best upgrades you’ve made. We really appreciate your feedback and your custom.
Was this review helpful? Yes No (1/0)
Only registered users can write reviews

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