Patent ID: 8567601

Claim:
A method for manufacturing a composite semi-rigid shingle comprising: manufacturing a composite semi-rigid shingle; and forming an arcuate bowed profile in said shingle by stacking a plurality of said shingles in a stacking arrangement, said stacking arrangement comprises at least a first layer and a second layer of shingle bundles, each shingle bundle comprising a plurality of shingles stacked on top of each other in the same direction wherein the top surface faces up and each layer comprising a plurality of shingle bundles configured in at least a first row and a second row and each row comprising a plurality of shingle bundles wherein the back edges of the shingles in the shingle bundles of the first row are adjacent to and face the back edges of the shingles in the bundles of the second row, and wherein the second layer of shingle bundles is similarly arranged and aligned orthogonally or perpendicularly to the first layer.