Roll roofing is to be applied to a deck that measures 100′ x 75′. The rolls are 100′ long and 4′ wide. The roofing will be lapped 3″ over the previous roll. How many rolls are required?

Roll roofing is to be applied to a deck that measures 100′ x 75′. The rolls are 100′ long and 4′ wide. The roofing will be lapped 3″ over the previous roll. How many rolls are required?