Roofing Glossary

Roofing Glossary

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There are 3 names in this directory beginning with the letter O.
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.

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

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