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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 to 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.

Toughened Glass Systems also provide a range of COXDOME AOV Rooflights.

What is an AOV rooflight?

Automatic opening vent, AOV, rooflights are provided with a number of control panels, switches, and hazard detectors, that allow the opening mechanisms to automatically activate upon detection of hazards such as excess smoke or heat, and provide ventilation and heat exhaustion to the room. They can also be manually opened to provide additional ventilation where required.

Key benefits of the AOV smoke vent rooflight

 Smoke vent rooflight AOV features:

  • Double or triple glazing 
  • Optional control panel
  • Optional fire switch
  • Optional fireman’s property switch
  • Optional smoke detector
  • Various kerb options
  • Various finishes

What other smoke vents do we sell?

We stock a range of smoke vents and access hatch rooflights, including:

More rooflight products

We also sell:

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.

Based on 210 reviews
Bob toploft
Bob toploft
I am the owner of Top loft company ltd, after reviewing reviews from various companies I ordered 2 juliet balconies from tgs arrived within 3 weeks, comunications and help was brilliant. Thanks for all your help.
Jim H
Jim H
Great service from the team. Easy to order, good buying guidance and clear install instructions for my builder. Rooflights look absolutely great! The team at TGS couldn't have been more helpful in organising a smaller delivery vehicle to help with restricted access. Highly recommend TGS.
Jack Smith
Jack Smith
Great service from a very knowledgeable company. Thanks team Toughened Glass Systems.
Paul Smith
Paul Smith
I was spending a lot of money on several rooflights so I wanted to make sure I got it right and I did. The professionalism, expertise and the quality of the roof lanterns really set Toughened Glass Systems apart.
Tyrone Eldridge
Tyrone Eldridge
There are no complaints about the experience with TGS. The entire process of ordering, supplying and delivering was flawless. I would really recommend you order your flat roof sky lanterns from these guys.
Robert Childers
Robert Childers
Best place for rooflights, they supply many different types and options. Thanks for all your support Toughened Glass Systems!
John Smith
John Smith
The glass balustrade gives us an amazing view onto the lake outside. So happy we ended up going for the frameless glass balcony from Toughened Glass Systems instead of one with posts
Louise Newsome
Louise Newsome
My job is to design the interiors for a lot of houses and a lot of times the hardest part was when the client wanted some really inexpensive rooflights that should look like some contemporary ones as well. That until I found Toughened Glass Systems and started working with them more and more. They have a lot of this kind of stuff at a very decent price, a price for anyone I can say. If you’re looking for cheap skylights for flat roofs or any types of roof lights, they probably have something for you.
Krystina Taylor
Krystina Taylor
Always kept us up to date with our order even when delayed by a few days. Great service from the start and good quality glass balcony delivered.