Roofing Glossary

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There are 7 names in this directory beginning with the letter D.
Damper
An adjustable plate for controlling draft.

Deck
The surface installed over the supporting framing members to which the roofing is applied.

Dormer
A framed window unit projecting through the sloping plane of a roof.

Double coverage
Application of asphalt roofing such that the lapped portion is at least two inches wider than the exposed portion, resulting in two layers of roofing material over the deck.

Downspout
A pipe for draining water from roof gutters. Also called a leader.

Drip edge
A noncorrosive, nonstaining material used along the eaves and rakes to allow water runoff to drip clear of underlying construction.

Dutch lap method
Application of very large individual shingles with the long dimension parallel to the eaves. Shingles are applied to overlap adjacent shingles in each course as well as the course below.