The Mardome Trade Dome Rooflight Polycarbonate comes in a range of sizes. It is a multifunctional, low-rise polycarbonate dome built to be aerodynamic. This product has an extensive collection of sizes and options to meet any demand with a selection of finishes and glazing variations.
Measuring & Installation Guide
Available in standard sizes from 450x450mm up to 2400x1800mm in 150mm increments. If your size is not listed then please contact us to discuss your options.
Measuring Guide for fitting to builders upstand
Measure external builders upstand Acceptable tolerance: • Fixed / unvented domes = dome size +20/-20mm
• Opening / vented domes = dome size +40/-20mm
As an example, if fitting on a builder’s upstand, the width should be 75mm and height of the upstand should be 150mm high. If you purchase a 900mm by 900mm from the drop down menu on our website your external timber size as shown in red above (Measure here) should be 900mm by 900mm. To use an example, if attaching on a builder’s upstand, the width should be 75mm and height of the upstand should be 150mm high. If you purchase a 900mm by 900mm then the external timber size as shown in red above should be 900mm by 900mm. There is a drop-down feature on our website to aid your selection of these. In this example your external timber size as shown in red above (Measure here) should be 900mm by 900mm.
Measuring Guide for domes with PVC kerb
Measure internal roof opening Acceptable tolerance = dome size +20/-30mm
To use an example, if buying with a 150mm or 300mm high upstand and you purchase a 900mm by 900mm then your structural opening size as shown in red above should be 900mm by 900mm. There is a drop-down feature on our website to aid your selection of these. In this example your structural opening size as shown in red above (Measure here) should be 900mm by 900mm.
TB186 Installation Mardome Trade Sloping and Direct Fix(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). ~Glass glazing option is not available with the access hatch option and limits other opening options depending on size 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
Polycarbonate rooflight light transmission properties are highlighted in the table underneath:
Clear – high visibility Maximum light generation Optimum clarity of vision and transparency of views and objects through the dome Opal – diffused light and solar control Maximum levels of diffused light generation joined with privacy Restricts solar glare and subtracts solar heat gain Impairs vision of optics and materials through the product 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 Minimizes solar glare and heat gain Offers a lower light transmission
Builders upstand (opening / vented) Dome is supplied complete with uPVC frame that fixes to top of builders upstand and houses any opening / ventilation equipment
150mm uPVC For mounting at roof surface level, providing 150mm of waterproofing height (exact kerb profile varies with specification)
300mm uPVC For mounting typically below roof surface level, providing 300mm of height for insulation and waterproofing
Trickle Vents 2 manually operated hit and miss trickle vents providing combined 8400mm² equivalent area ventilation. Please note trickle vents cannot be supplied with 450mm by 450mm size.
Mardome standard fixed dome data sheet(Click here to view PDF)
10 year manufacturer’s warranty.
Delivery & Lead Time
Lead time for this product is 2-3 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.