Details: Weep Screed at Concrete Foundation
According to the Stucco Manufacturers Association, the building code requires that cement stucco over framed walls have a weep screed placed at the base of framing. The screed shall have a 3 1/2-inch attachment flange and be of a style to allow water to drain out. The water resistant barrier(s) shall lap the flange by more than 2 inches. This is not required for masonry or concrete walls.
Detail courtesy of the Technical Services and Information Bureau.