Counter flashing

counter flashingFormed metal or elastomeric sheeting secured on or into a wall, curb, pipe, roof-top unit or other surface to cover and protect the upper edge of a base flashing and its associated fasteners.

COUNTER FLASHING - Sheet metal placed at the base of a parapet wall over the roof covering, or at the base of a chimney, to prevent water entry. CRAWL SPACE - A narrow, unfinished area usually filled with soil located in the cellar or basement.

Counter flashing: A flashing used under the regular flashing to flash in another direction. Cove: Molded trim of a concave shape used around cabinet construction and other built-ins.

Counter flashing — A metal flashing usually used to cover another flashing and prevent moisture entry.

Counter Flashing - See Cap Flashing Course - A row of shingles or roll roofing running the length of the roof. Convection - Air naturally circulated by differences in temperature. Colder, denser air falls and displaces the lighter, warm air.

Counter flashing: A metal flashing usually used on chimneys at the roofline to cover shingle flashing and used to prevent moisture entry.

Counter Flashing - (1) A flashing used under the regular flashing. (2) A metal flashing usually used on chimneys at the roofline to cover shingle flashing and used to prevent moisture entry.

Counter Flashing: The formed metal secured to a wall, curb, or roof top unit to cover and protect the upper edge of a base flashing and its associated fasteners.

Counter Flashing - Sheet metal or other material that is used at the roofline around chimneys to prevent the invasion of water into the building.

Counter flashing Strips of metal, roofing, or fabric inserted and securely anchored to the reglet or attached to a vertical surface above the plane of the roof and turned down over the face flashing to protect the base flashing.

Most chimney flashing consists of a two-part system - the "L-shaped" flashing that abuts the roof and the chimney and the counter flashing or "cap shield" that covers the piece facing the chimney.

Skylights without curbs or with inadequate curbs do not allow for proper step and counter flashings, and are destined to leak.

Metal Flashing Frequently used as through-wall, cap- or counter flashing. See Flashing. Metal Flue A metal channel through which hot air, gas, steam or smoke may pass.

The flashing’s vertical edge is usually tucked under siding or capped with a second counter flashing that is mortared into the chimney or caulked along a skylight so water can’t sneak in behind it.

See also: Roof, Counter, Flashing, Water, Chimney