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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
£127.58
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
£127.58
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections
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Current configuration
From £127.58 ex. VAT
£153.09 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

The Mardome Trade Fixed Dome Rooflight is a high-quality polycarbonate rooflight designed to maximise natural daylight while delivering durability and thermal performance. Suitable for residential, commercial and educational buildings, this fixed dome rooflight is available in a wide range of sizes from 450mm to 2400mm in length and 450mm to 1800mm in width

Manufactured from impact-resistant polycarbonate, this flat roof skylight offers a cost-effective and robust alternative to glass rooflights. It can be installed onto a builders upstand or supplied with a 150mm or 300mm PVC kerb for improved waterproofing and ease of installation.

Available Sizes 

This Mardome Trade Fixed Polycarbonate Dome Rooflight is available in square and rectangular configurations, including:

450mm x 450mm
600mm x 600mm
750mm x 750mm
900mm x 900mm
1000mm x 1000mm
1050mm x 600mm
1200mm x 600mm
1200mm x 900mm
1200mm x 1200mm
1500mm x 900mm
1500mm x 1200mm
1800mm x 900mm
1800mm x 1200mm
1800mm x 1500mm
2100mm x 1200mm
2100mm x 1500mm
2400mm x 1200mm
2400mm x 1500mm
2400mm x 1800mm

This wide size range ensures suitability for small utility spaces through to large commercial flat roof applications.

Glazing Options

Available in four glazing specifications:

1. Single skin polycarbonate rooflight – economical solution

2. Double skin polycarbonate rooflight – improved insulation

3. Triple skin polycarbonate rooflight – Improved thermal performance

4. Quad skin polycarbonate rooflight – maximum insulation within the range

Higher skin options improve thermal performance and reduce heat loss, making them suitable for heated spaces and energy-conscious projects.

Shape Options

Choose from:

1. Low Rise Dome

2. Low Rise Pyramid

Both designs provide strong weather resistance and excellent daylight distribution across flat roof areas.

Tint & Finish Options

Available in:

1. Clear polycarbonate (maximum light transmission)

2. Opal finish (diffused light, reduced glare)

3. Patterned finish (increased privacy)

Kerb & Installation Options

Supplied either:

-  For installation onto a builders upstand

-  With a 150mm waterproofing height PVC kerb

-  With a 300mm waterproofing height PVC kerb

-  Kerb options increase waterproofing height and simplify flat roof integration.

Fixed & Ventilation Options

Available as:

-  Fixed non-vented rooflight

-  Manual trickle vent rooflight

Manual vents provide background ventilation while maintaining security and weather performance.

Suitable For

-  Flat roof extensions

-  Kitchen and living extensions

-  Commercial buildings

-  Schools and healthcare buildings

-  Refurbishment and new build projects

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)

The Mardome Trade Fixed Polycarbonate Rooflight is designed for quick and secure installation onto flat or low-pitch roofs. It can be mounted directly to a builder’s upstand or supplied complete with an insulated kerb, offering flexibility for different project requirements.

Installation Guidelines:

  • Suitable for installation onto existing builder’s upstands or with a supplied Brett Martin insulated kerb.
  • Ensure the upstand is correctly dimensioned, insulated, and weathered prior to installation.
  • Glazing must be correctly orientated, with the UV-resistant layer facing upwards (as marked).
  • When using direct-fix (sloping) method, refer to installation guide for appropriate fixings and sealing procedures.
  • Thermal fracture caution: Avoid placing blinds directly beneath the glazing; use light-coloured blinds positioned away from the rooflight to reduce risk of thermal stress fracture.
  • Minimum upstand height and slope should be checked per building regulations and installation guide recommendations.

Product Dimensions


Mardome Trade Rooflights offer differing kerb options depending on project specification. The Mardome 150mm or
300mm Kerb is offered for use when there is no pre-existing structural, insulated upstand, or when over-sailing the current
upstand is prefered. When the rooflight is to be fitted to an existing structural, insulated upstand, unventilated Trade
rooflights are to be fitted directly, whilst ventilated or opening Trade rooflights are supplied complete with a Direct Fix kerb.

For a full step-by-step installation guide for the Mardome Trade Fixed Polycarbonate Rooflight, watch the video below or download our installation guide here.

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

How Your Mardome Rooflight Is Delivered

  • Delivered kerbside by the Brett Martin transport fleet
  • Glass and frame delivered together on an A-frame
  • Driver can assist with unloading if required
  • Sacrificial foam runners protect the glass during unloading
  • The A-frame is removed by the driver after delivery

Important: Please ensure someone is present on the day of delivery to help unload the rooflight from the lorry.

Delivery Times

Standard Trade Fixed rooflights delivered within 1–2 working days. Free UK mainland delivery.

Orders placed before 12 noon (Monday to Friday) are prioritised for dispatch.

Delivery Cost

Delivery is free to all UK mainland addresses.

For non-mainland and remote postcodes, please contact us.

Excluded Delivery Postcodes

We currently do not deliver to the following areas without prior arrangement:

Scotland, Northern Ireland, Channel Islands & Remote Areas

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

Contact our team to check if delivery to your area can be arranged.

Contact Us

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

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
Was this review helpful? Yes No (1/0)
Only registered users can write reviews

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