Measuring & Installation Guide
To supplement the downloadable PDF link at the bottom of this page and product data sheet provided please see the measuring instructions below. Study these with the accompanying access Hatch Measuring CAD Drawing PDF.
If you buy a 900mm by 900mm from our website drop down menu your structural opening would need to be 900mm by 900mm. As an example, the structural opening hole size that needs to be cut for this rooflight is the size of the rooflight you purchase from the drop-down menu.
Access Hatch Measuring CAD Drawing(Click here to view PDF)
Mardome Standard fixed dome data sheet(Click here to view PDF)
TB188 Installation Mardome Trade and Ultra Manual Openers(Click here to view PDF)
*Centre pane U-value is a measure of the thermal efficiency of the glazing type.
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.
To see the light transmission properties of the polycarbonate rooflight, look at the table below:
Clear – high visibility, light transmission maximised, Clarity of vision of views and objects through the dome maximised.
Opal – diffused light and solar control, a unique combination of high levels of diffused light transmission and privacy, ultimate prevention of solar glare and mass reduction of solar heat gain, reduced visual capacity by impairing vision through the dome of sights and objects.
Patterned – privacy, marries privacy with high levels of light processing, less significant daylight, repels sights of views and objects through the dome.
Bronze – solar control, limits solar glare and heat gain, generates a lower transmission of light.
10 year manufacturers warranty.
Delivery & Lead Time
Lead time for this product is 2-3 working days if ordered before 12pm for standard sizes. Lead time for custom sizes will vary.
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.