ABC Roofing Terms Glossary

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Term	Definition
Metal drip edge	A narrow strip of non-corrodible metal used at the rake and eave to facilitate water runoff.
Mineral-surfaced roofing	Asphalt shingles and roll roofing that are covered with granules.
Modified Bitumen	Roofing asphalt that has been blended with some of a broad range of materials which improve its performance characteristics.
Nesting	A method of re-roofing with new asphalt shingles over old shingles in which the top edge of the new shingle is butted against the bottom edge of the existing shingle tab.
New construction	Installing a roof system on new construction.
No-cutout shingles	Shingles consisting of a single, solid tab with no cutouts.
Non-prorated warranty	A warranty which provides full replacement costs for the item(s) covered during the full term of the warranty. In contrast, a prorated warranty merely reimburses a percentage of replacement costs, depending on the age of the roof.
Non-veneer panel	Any wood based panel that does not contain veneer and carries an APA span rating, such as wafer board or oriented strand board.
Normal slope application	Method of installing asphalt shingles on roof slopes between 4 inches and 21 inches per foot.
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.