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Standard three-tab asphalt shingles are made in 12-inch by 36-inch pieces that are designed to give the appearance of individual shingles. The exposed portion is called "exposure" and the lower edge is referred to as the "butt."
--Don Vandervort
Standard three-tab asphalt shingles are made in 12-inch by 36-inch pieces that are designed to give the appearance of individual shingles. The exposed portion is called "exposure" and the lower edge is referred to as the "butt."