Method of valley construction in which shingles on both sides of the valley are trimmed along a chalk line snapped on each side of the valley. Shingles do not extend across the valley. Valley flashing is exposed.
An asphalt roofing base material manufactured from cellulose fibers.
An asphalt shingle reinforced with organic material manufactured from cellulose fibers.
That portion of the roof structure that extends beyond the exterior walls of a building.
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