Question1
1. When using Polyfoam Sarking Board System, How much
of the board sits on top of the rafter?
Always 55mm. Polyfoam Sarking Board System consists of a 75mm
T-Shaped `Top Hat` overlay board and Polyfoam Raftersqueeze
flexible infill board. Raftersqueeze infill board is available in
thicknesses of 75mm, 65mm and 50mm.