The Crimped Profile Ridge shows the highest point of the roof, where the tiles are stopped and a ridge tile is used to finish the meeting of the two roof surfaces. A 175mm x 32mm Ridge Board is installed to attach the rafters. It is crucial to depict how the roof felt underlay wraps around the top of the ridge board. Crimped Profile Ridge ensures that any moisture that may penetrate the ridge tiles will not decay the timber of the roof.