A groove that is cut into the side of a vertical surface such as a wall or chimney that is used to insert a flashing element such as a reglet or counterflashing. For a picture, click here.

A groove or slot, often cut in a masonry wall or other vertical surface adjoining a roof, for inserting an inset flashing component such as a reglet.

Same as Reglet.

A groove in a joint or special unit to receive roofing or flashing.

A groove cut in masonry; any groove provided to receive roofing or flashing.