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Brett Martin Mardome Circular Rooflight

  • From £74.40 (ex. VAT)
Item in Stock | Free Next Working Day Delivery (Mon-Fri)
Want it by Tuesday 3rd March? Order within 2 days, 21 hours, 35 minutes and choose FREE UK Next Working Day Delivery (Mon-Fri) at checkout.
Free Delivery (see above for delivery estimate)
  • Available in standard sizes from 600mm up to 1800mm diameter
  • Non-opening and non-venting
  • Single, double and triple skin units available
  • Clear, Opal or Textured polycarbonate
  • Available as dome only for fitting to existing upstand or with an insulated GRP kerb
  • Please note, as this is a bespoke assembled product, any returns are subject to a 35% restocking charge


The low profile dome provides an economical solution when circular rooflights are required. We supply as either dome only to fit existing upstands or can be supplied with an insulated GRP kerb.


Mardome Roofligths are designed and manufactured under an ISO9001 approved quality system
BBA Approval - Full BBA approval under 06/4385


Outer dome is manufactured from 3mm impact resistant Marlon FSX Longlife polycarbonate sheet which has a UV Protective coating on both sides. This coating stabilises the product to avoid discolouration and weakening due to exposure to sunlight. Where double and triple glazed domes are being used, the inner domes are manufactured from 2mm thick impact resistant Marlon FSX longlife polycarbonate sheet. Polycarbonate is has an impact strength 200 times greater than glass which makes breakage very difficult.

The kerb is manufactured from insulated Glass Reinforced Plastic (GRP) with a gloss gel coat layer to the inside. This gives a smooth, maintenance free surface with excellent reflective properties.

Fire Rating

Building Regulations Approved Document B (2006 edition amended 2007) sets out the rules for fire safety of buildings, which can be met by achieving specific fire ratings to either British (BS476) or European (BS EN 13501) test standards.
Brett Martin Daylight Systems Mardome Circular Rooflights achieve Class B s1, d0 to BS EN 13501: Part 1. Building Regulations state they can be regarded as Broof (t4).

Guaranteed for 10 Years

Mardome Circular Rooflights are designed to remain fit for purpose in normal industrial conditions for a period of 20 years (Guaranteed for 10). They will not become perforated, lose signifiacnt structural integrity or distort to the extent of losing weather-tightness. In addition the polycarbonate used is guaranteed against loss of daylight transmission, discolouration or loss of impact strength for 10 years.

Safety Requirements/ CDM Regulations
Circular rooflightas achieve Class B non-fragility to ACR[M]001 when new and fully installed in accordance with the manufacturers installation guide

Foot traffic on all rooflights should always be avoided; impacts such as foot traffic or a falling person may cause damage which may necessitate rooflight replacement

Light Transmission and Glazing Options

How to select the correct size

Use the two diagrams below to help explain how to measure to ensure you order the correct size for your project.

Dome Only

How to measure


Roof Dome Size information


Roof Dome - Select a roof dome that is the same size or bigger than the structural opening in your roof. Please note the daylight opening for Mardome Circular is equivalent to the diameter of the roof opening size less 150mm

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Free Next Working Day Delivery

Applies to the vast majority of our customers and all but one of our products (more information on this later).

The lead times and delivery service are clearly displayed against each product, just below the price.

Please note, for certain products and delivery zones we can offer AM deliveries and Saturday Deliveries, if available, you'll be able to select and pay for these options via the checkout.

Delivery Charges will be applied for the following reasons:

You're outside of UK Zones A&B (Certain parts of Scotland, Scottish Islands, Northern Ireland, Channel Islands and IOM)
To view our delivery zones please View our delivery zones

We're unable to offer the following product/s with Free delivery:
Stira Loft Hatch/ Ladder combined


You can return a standard product within 14 days of receipt. Please note Made to measure products cannot be returned.
Click here to download a return form.