Patent attributes
An exemplary roofing system for covering an existing shingle roof with an exposure height measured between bottom edges of adjacent courses is disclosed. The roofing shingle system comprising includes a plurality of reroofing shingles. The reroofing shingles have an exposure portion extending from a top edge to a bottom edge for a height that is at least the exposure height of the existing shingle roof. At least one course of reroofing shingles is installed on at least one course of the existing shingle roof, wherein the course of the existing roof is covered by the at least one course of reroofing shingles. The top edge of the reroofing shingles abuts the bottom edge of the adjacent course of existing shingles.