Encyclopedia

cap flashing

counterflashing, cover flashing, cap flashing

counterflashing
A strip of sheet metal, often built into masonry and turned down over other flashing; used to prevent water from entering the joints and the exposed upturned edges of base flashing on a roof.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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References in periodicals archive
The Ladder Lock can be secured to several surfaces including plywood, metal overhands, gutters, wall cap flashing and tubing in a matter of seconds.
If the sidewall is stucco or solid wood like ours and you can't open it to get flashing behind it, continue the step flashing to the peak of the roof, then cover the step flashing with cap flashing (Photo 2).
Perimeter sheet metal (cap flashing) should be secured to the substrate.
Many contractors nail a deck ledger to the house and install a metal cap flashing over the ledger.
Cap flashing (counter flashing) inserted into mortar joints will cover the top edge.
If the cap flashing won't pull out of the mortar joint, use the pry bar blade as a chisel to cut it off flush with the chimney.
Cap flashing must be installed as soon as possible after the finish coat has been applied.
Although the clad window has a built-in drip cap flashing on the top of the frame, we'll be adding a wood molding above the window that also should be protected by a drip cap.
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