Rafter Roll has been designed to avoid collapsing when installed over the insulation. The robust shape of the ribs provide additional strength, and guarantees, that when fitted over the wall plate, the ventilation to the roof space remains unobstructed.
The larger widths also ensure, that when fitted with the new higher levels of insulation, the ends of the ventilators are not blocked.
Sizes 300mm, 400mm, 600mm & 800mm