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Mardome Trade Fixed Polycarbonate Dome Rooflight
Rated 5/5 by customers
From
£113.20
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections

Your configuration

Mardome Trade Fixed Polycarbonate Dome Rooflight

(Rated 5/5 by customers)

“Honestly, this has been one of the best upgrades we’ve done.”
From
£113.20
ex. VAT
Based on the lowest‑priced size/spec. Price updates with selections
1: Length Step 1 of 8
1: Length
2: Width Step 2 of 8
2: Width
3: Glazing Step 3 of 8
3: Glazing
4: Tint Step 4 of 8
4: Tint
5: Shape Step 5 of 8
5: Shape
6: Kerb Step 6 of 8
6: Kerb
7: Opening Step 7 of 8
7: Opening
8: Ventilation Step 8 of 8
8: Ventilation

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From £113.20 ex. VAT
£135.84 inc. VAT
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Made in the UK

10 yr warranty

3-5 day delivery

Product overview

Mardome Trade Fixed Polycarbonate Dome Rooflight

As part of our Polycarbonate Dome Rooflights range, this is 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.

✓
Durable polycarbonate glazing Impact-resistant polycarbonate provides a robust alternative to glass for flat roof applications.
✓
Wide choice of sizes Available in square and rectangular sizes from 450mm up to 2400mm depending on configuration.
✓
Flexible specification Choose glazing skin, tint, shape, kerb and ventilation options to suit the project.
✓
Fast mainland delivery Qualifying standard Trade Fixed rooflights may use the 24-hour or 48-hour service, subject to the selected configuration, order time and availability.

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.

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Benefits & features

Mardome Trade Fixed

A dependable fixed polycarbonate rooflight for straightforward daylighting, with a broad choice of size, glazing, tint and kerb options.

✓Natural daylightBrings useful daylight into flat-roof buildings without an opening mechanism.
✓Low-maintenance fixed designA simple non-opening format supports reliable weather performance.
✓Durable polycarbonateUV-stabilised glazing provides impact resistance and helps retain clarity.
✓Flexible specificationSelect the available skin build-up, tint, shape, kerb and ventilation option.

Specification at a glance

FormatFixed, non-opening rooflight.
GlazingSingle, double or triple skin; confirm quadruple skin with production.
TintClear, opal or patterned.
ShapeDome or pyramid where offered.
KerbBuilder’s upstand, 172, 216, DF or 300 mm where offered.
VentilationUnvented or manual trickle ventilation.
Roof applicationFlat and low-pitch roofs, subject to the official installation guide.
ManufactureUK manufactured with the published manufacturer warranty.
Available options depend on the selected size and final configuration. Confirm the product selector, delivery service and installation requirements before ordering.
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.

✓
Builder’s upstand For projects where a suitable structural, insulated and weathered upstand has already been prepared.
✓
150mm PVC kerb A practical option where integrated waterproofing height is required.
✓
300mm PVC kerb A higher kerb option for projects requiring additional upstand height.
✓
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.

Lead times & delivery

Mardome Trade Fixed ordering guide

Qualifying standard Trade Fixed configurations can use the 24-hour or 48-hour service. Orders for express manufacture must be placed before 12 noon.

24 hoursQualifying standard Trade Fixed combinations.
48 hoursQualifying combinations from the extended Mardome matrix.
5 working daysPyramid or Secured by Design configurations.

Service matrix

Service Eligible configuration Ordering note
24-hour Qualifying standard Trade fixed combination Confirm final quantity and availability
48-hour Qualifying extended-matrix combination Confirm quantities above five
5 working days Pyramid or Secured by Design specification Confirm final configuration
By application Other sizes, quantities or variances Confirm before ordering

Representative standard sizes (mm)

450×450 600×600 750×750 900×600
900×750 900×900 1050×600 1050×750
1050×1050 1200×600 1200×900 1200×1200
1350×1050 1350×1350 1500×1050 1500×1500
1800×900 1800×1200 1800×1800 —

Delivery and ordering

Free UK mainland delivery. Remote or restricted delivery areas require prior arrangement. Larger orders, unusual specifications, overseas delivery and restricted postcodes require confirmation.
Please note

The three-unit and ten-unit limits in the brochure apply specifically to Reflex. For Mardome Trade, confirm lead time and availability for larger quantities.

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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.
Reviews
Based on 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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