Counterflashing

Counterflashing

Waterproof material, such as sheet metal, installed on the face of a wall that overlaps and seals the top of the vertical flashing below.

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.