Reduced risk of condensation
made to measure
- UK mainland delivery
- Fast delivery
- Great U values
- Sleek, contemporary inside and out
- Available in Single Double, Triple Skins and Quad skins
- Many sizes available from 600x750mm up to 1800x2400mm
- Various dome finishes available
- Option to purchase Multiwall PVC kerb
Click Tabs Below To Reveal More Information
Dome Rooflight Polycarbonate are available in sizes a range of sizes and glazing types.
This is the installation guideline. You can download a PDF at the base of this page. Product data sheet provided at the bottom too.
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
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.
*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
Minimises 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
For mounting at roof surface level, providing 150mm of waterproofing height (exact kerb profile varies with specification)
For mounting typically below roof surface level, providing 300mm of height for insulation and waterproofing
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.
WARRANTY10 year manufacturer’s warranty.
Lead time for this product is 2-3 working days for the sizes below. Lead time for all other sizes will be on application, other sizes will be between 3-7 working days but this depends workload. 450×450, 600x600m, 750×750, 900×600, 900×750, 900×900, 1050×600, 1050×750, 1050×1050, 1200×600, 1200×900, 1200×1200, 1350×1050, 1350×1350, 1500×1050, 1500×1500, 1800×900, 1800×1200, 1800×1800 .
Please Note lead time to Ireland will be longer than the standard lead time above.