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.
References in periodicals archive ?
gravel stops, base flashing, cap flashing, chimney flashing, through
9 Install modified bitumen self-adhered base flashings and torched applied cap flashings.