There are other common causes for leakage at parapet walls.
Parapet wall roof leaks.
Water from either of these locations may bypass flashing and enter the backup wall directly.
Don t seal the parapet rain the primary source of water is driven by wind through permeable masonry units mortar joints and cracks in the wall.
Seam separation is a common issue with traditional roofing materials.
On the other hand the roof doesn t know which direction the rain is coming from.
Roof leaks in the roofing seams on the parapet walls can be repaired the same way as the flat roof area in just a few minutes with the scrs.
It is the wind pressure that causes the majority of wall leaks not water flowing down the wall.
If the cavity drains freely water should move down to the lower levels of flashing and drain from the wall.
The parapet walls around the roof also have these seams.