Roof Flashing Parapet Walls

The purpose of a flashing is to make the building weather resistant and to prevent water from entering the building by diverting it.

Roof flashing parapet walls.

Usually supported by heavy gauge straps trough gutters are very efficient and have better self cleaning properties than box gutters. Parapet wall caps are custom fabricated to any measurements and it usually measure 10 in length but can also be bent in 12 lengths. No continuity of the four principle control layers. Flashings and cappings are strips of metal formed to weatherproof the edges of roofing and walling.

This is what we typically get in the real world today. For the purposes of this chapter only the term flashing is used. It is formed between a roof surface and a parapet wall or between two roof surfaces and is available with infold outfold splashback and squashfold edges. Other materials such as colorbond ultra colorbond stainless uncoated stainless copper and aluminium are also available.

According to the international building code the parapet walls on a roof are required to be properly coped with noncombustible weatherproof materials of a width not less than the thickness of the parapet wall. Continuity of the control layers between roofs and walls is the whole enchilada. Wsrca suggests for walls 24 inches and taller that wall cladding be considered in lieu of membrane wall flashings per detail tp 8a. A half round segmented gutter formed into a trough.

Many buildings have flat roofs in certain areas specifically for air condoning units and etc. Vertical wall flashing this detail shows a flashing condition at a vertical wall or parapet. When i first saw it the lightbulb went off. This detail may be used where wall heights are 24 48 inches above roof surface.

At the edge of these roofs parapet walls are commonly found and are vulnerable to leaks if not flashed correctly. The counterflashing laps the base flashing a minimum of 3. Step 1 flashing 1 is a typical apron roof flashing. The roofing squares are locked into a 20 oz.

Copper base flashing which extends at least 8 up the wall. Attaching flashing to a parapet wall requires basic sheet metal tools and knowledge of sheet metal or copper soldering. On walls greater than 36 inches high membrane wall flashing sheets are suggested to be strapped i e installed vertically. No membrane under the parapet flashing.