Smoke Vent Rooflight AOV – Mardome Trade


Please see images for optional extras in the Description Tab lower down on this page

Please Ensure Sizes Ordered Are Correct – Sizes Cannot be Changed Once The Order Is Processed.

This item is made to order
All prices are subject to 20% VAT

Contact Us
UK mainland delivery
Great U Values
Stock sizes fast delivery
Available in Double & Triple Skins
A range of finishes available
Complies with BS EN 12101-2
Wind Deflectors available to improve aerodynamic performance

These polycarbonate dome rooflights provide comfort ventilation and both heat exhaust and natural smoke ventilation. Brett Martin Daylight Systems Mardome Trade Smoke Vents can be installed on all modern buildings with a flat roof and their design and subsequent manufacturing are both ISO9001 quality approved. In addition to this, the products are EN12101-2 : 2003 tested and certified. Further specific detail and dimensions can be found on the technical data sheet in the technical information section.

If you are looking to improve the natural light level in your premises and need it be durable, consistent and contemporary then the Mardome Trade Smoke Vent Rooflight is perfect for you.

Accessories include fireman’s priority switch, smoke detector and fire switch all available with a control panel as an optional extra.


Control Panel 5A / 8A

Fire Switch

Fireman’s Priority Switch

Smoke Detector

Measuring & Installation Guide

Installation instructions can be found below and are accompanied by a downloadable PDF link at the base of this page with a full product data sheet.

Range of Sizes

Available in sizes from 1050x1050mm up to 1800x1800mm which stagger up in 150mm increments. If your size doesn’t appear here, we will be happy to assist with any query.

Measuring Guide for fitting to builders upstand

Acceptable tolerance:

  • Internal builders upstand = (dome size – 150mm) +20/-0
  • External builders upstand = dome size +40/-20mm

If you are installing on your own upstand, the upstand height should be 200mm. For example, on our website is a drop-down menu for you to order from, ff you choose 1050x1050mm this would mean your structural opening would be 900x900mm. The builders upstand should be 75mm in width.

Measuring Guide for domes with PVC kerb

Measure internal roof opening

Acceptable tolerance = dome size +20/-30mm

If you purchase with an upstand then the size you order from our website’s drop-down menu will be the structural opening measurement (shown in the diagram above in red). Please note this does not apply if you fit on your own upstand.

TB286 Installation Mardome Trade Smoke Vent(Click here to view PDF)

Technical Information

Glazing Information

Centre pane U-value is a measure of the thermal efficiency of the glazing type.

Ud-value is a measure of the thermal efficiency of the whole rooflight (calculated in accordance with NARM Technical Document NTD2).

Part L Building Regulations require a U-value of at least 2.2W/m2K: Brett Martin Daylight Systems recommend the use of at least triple skin rooflights in all applications


The table below shows Reflex polycarbonate rooflight light’s transmission properties:

Clear – high visibility

Maximum transmission of light
Elevated transparency of vision of everything through the dome

Opal – diffused light and solar control

Ties privacy with top levels of diffused light generation
Prevents solar glare and minimises solar heat gain
Reduces sight of all objects through the dome

Patterned – privacy

Partners increased levels of light transmission with privacy
Diffused light of day
Impairs the optical production of materials through the dome

Bronze – solar control

Restricts solar glare and heat gain
Offers a lower transmission of light

Additional Options

To enquire about additional options please call or email us.

Fire and Comfort Ventilation Control Panel – EN12101-10 certified.

Fireman’s Priority Switch with break glass to open/close Smoke Vent without influencing the alarm.

Fire Switch with break glass to open Smoke Vent and activate the alarm.

Smoke Detector

TB285 Datasheet Mardome Trade Smoke Vent(Click here to view PDF)


10 year manufacturers warranty.

Delivery Lead TIme

Lead time for this product is 7-10 working days if ordered before 12pm for standard sizes.

Please note that the transport company is not responsible for delivering inside the property. They are not insured to do this so you will need to ensure an appropriate person is designated and on site to offload the product out of the vehicle once the driver arrives. We do not recommenced arranging equipment and installation until the item has been delivered.