Parapet Wall Roof Flashing

This short repair video shows how to tie in a flat roof to a parapet wall with an l flashing using only surecoat roof coating and poly mesh.

Parapet wall roof flashing.

The top of the roof pan is formed into a bread pan whose upper edge is just above the finished batten. Parapet wall caps are custom fabricated to any measurements and it usually measure 10 in length but can also be bent in 12 lengths. At the edge of these roofs parapet walls are commonly found and are vulnerable to leaks if not flashed correctly. Mortar bridges below the through wall flashing may be allowing water to cross the cavity into the backup wall.

Attaching flashing to a parapet wall requires basic sheet metal tools and knowledge of sheet metal or copper soldering. The examples shown indicate styles commonly used. Many flat and low slope roofs are surrounded by parapet walls. 1 roll out bitumen flashing atop the wall from end to end with the.

Water from either of these locations may bypass flashing and enter the backup wall directly. Water may be entering the coping at the top of the parapet or entering the roof side of the parapet. We also manufacture radius parapet wall caps and can match any profile. Copper flashing is locked into this edge and extends at least 8 up the wall.

Whether you prefer a simple screw through or more complex hidden fastener style we are able to build what you require. A copper receiver holds the counterflashing at its top edge. As a roof ages the roofing seams begin to separate often beginning where the flat roof meets the parapet wall. This detail may be used where wall heights are 24 48 inches above roof surface.

On walls greater than 36 inches high membrane wall flashing sheets are suggested to be strapped i e installed vertically.