There are currently 15 names in this directory beginning with the letter C.
A line made on the roof by snapping a taut string or cord dusted with chalk. Used for alignment purposes.
The highest fire-resistance rating for roofing as per ASTM E108. Indicates roofing is able to withstand severe exposure to fire originating from sources outside the building.
Fire-resistance rating that indicates roofing materials are able to withstand moderate exposure to fire originating from sources outside the building.
Fire-resistance rating that indicates roofing materials are able to withstand light exposure to fire originating from sources outside the building.
Closed cut valley
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 two inches from the valley centerline. The valley flashing is not exposed.
A layer of viscous asphalt applied to the base material into which granules or other surfacing is embedded.
Pre-formed flange placed over a vent pipe to seal the roof around the vent pipe opening. Also called a vent sleeve.
Concealed nail method
Application of roll roofing in which all nails are driven into the underlying course of roofing and covered by a cemented, overlapping course. Nails are not exposed to the weather.
The change of water from vapor to liquid when warm, moisture-laden air comes in contact with a cold surface.
That portion of the flashing attached to a vertical surface to help prevent water from migrating behind the base flashing.
Amount of weather protection provided by the roofing material. Depends on number of layers of material between the exposed surface of the roofing and the deck (single coverage, double coverage, etc.).
A peaked saddle construction at the back of a chimney to help prevent accumulation of snow and ice and to deflect water around the chimney.