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
- 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)
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
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.
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.