In situations where the parapet wall extends above the maximum 12-inch flashing height and wall waterproofing is required, there are several options. In the case of concrete or masonry walls: waterproofing can be provided by installation of a membrane covering, a metal covering or a waterproofing coating.
The waterproofing substrate must be properly prepared prior to the application of the plaza drain flashing material. Any openings and/or defects in the substrate must be properly repaired.
A critical and often overlooked design detail is at the termination of a parapet coping at a wall. The most common mistake at this intersection is to allow the metal coping to but up to the wall without the application of termination metal.
The most common source of roof leaks is at vertical transitions and penetrations. Most designers provide adequate details to wall and curb flashings and common penetrations such as
