R4 660mm x 960mm Single Glazed Polycarbonate Dome Only - Clear Description To Fit Existing or Site Formed Curb of 600mm x 900mm (External Dimensions) Properties Double Glazed : Light transmission - 77%. Solar heat gain factor - 69%. Sound reduction (db) - 20. Thermal t...Read More
R4 660mm x 960mm Single Glazed Polycarbonate Dome Only - Clear
Description
To Fit Existing or Site Formed Curb of 600mm x 900mm (External Dimensions)
Properties
Double Glazed :
Light transmission - 77%.
Solar heat gain factor - 69%.
Sound reduction (db) - 20.
Thermal transmission (w/m2k) - 2.68.
Triple Glazed :
Light transmission - 70%.
Solar heat gain factor - 60%.
Sound reduction (db) - 22.
Thermal transmission (w/m2k) - 1.78.
Features
• Polycarbonate rooflights comply with HSG 33 (Health and Safety in Roofwork) recommendations.
• Patented high security screwbolt fixings.
• Perimeter seal and screw fixing ensure Em-Dome™ rooflight is fully waterproof.
• All polycarbonate Em-Domes™ use a minimum 3 mm thick glazing.
• Acrylic Em-Domes™ have a minimum 3mm outer skin.
• Inner skin thickness varies according to the dome size.
• When installed in accordance with the manufacturers' recommendations, Em-Domes™ are expected to exceed the life of the roof covering.
• Em-Domes™ are guaranteed against the effects of defective design, materials or construction for ten years, subject to certain conditions.
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