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ABC Roofing Terms Glossary

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Term Definition
Open valley

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.
Organic felt

An asphalt roofing base material manufactured from cellulose fibers.
Organic shingle

An asphalt shingle reinforced with organic material manufactured from cellulose fibers.
Overhang

That portion of the roof structure that extends beyond the exterior walls of a building.
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