Dictionary
- Cant Strip
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A beveled strip used under flashings to modify the angle at the point where the roofing or waterproofing membrane meets any vertical element.
- Cap Flashing
- Cap Sheet
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A granule-surfaced coated sheet used as the top ply of a built-up roof membrane or flashing.
- Cleat
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A strip of wood or metal fastened across other materials for additional strength; may be nailed against the wall for supporting an object.
- Closed-cut Valley
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A method of valley treatment in which shingles from one side of the valley extend across the valley, while shingles from the other side are trimmed 2" from the valley centerline. The valley flashing is not exposed.
- Coal Tar
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A dark brown to black, semi-solid hydrocarbon obtained as residue from the partial evaporation or distillation of coal tar.
- Cold-Process Roofing
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A continuous, semi-flexible roof membrane, consisting of plies of felts, mats, or fabrics that are laminated on a roof with alternate layers of cold-applied roof cement and surfaced with a cold-applied coating.
- Collar
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Pre-formed flange placed over a vent pipe to seal the roof around the vent pipe opening. Also called a Vent sleeve.
- Condensation
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The conversion of water vapor or other gas to liquid as the temperature drops or the atmospheric pressure rises.
- Coping
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The covering piece on top of a wall exposed to the weather, usually sloped to shed water.
- Counter Flashing
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A water shedding device most often fabricated out of sheet metal. It is installed over the terminations along the top of wall flashings.
- CPA
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A plastic copolymer alloy manufactured by the Duro-Last Corporation. This polymer is combined with plasticizers. The finished roof material is reinforced with a weft woven polyester mat.
- Creep
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The permanent deformation of a roofing material or roof system caused by the movement of the roof membrane that results from continuous thermal stress or loading.
- Cricket
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A relatively small, elevated area of a roof constructed to divert water around a chimney, curb or other projection.
- Cupola
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A hemispherical roof; a small structure above the roof.
- Curb
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A protective rim.