Mardome Fixed Polycarbonate Window Rooflight, Flat Roof Dome Kerbed Skylight
If Trickle Vents are ordered, they will be installed on the short sides of the PVC-u Kerb (if the rooflight is not square). i.e 600x600mm rooflight = hole size of 600x600mm. Centre Pane U-value (W/m2 K).