Flat Roof Parapet Repair

For clarity flat roofs actually have a slight slope to allow rain water to drain off the roof but they seem flat when compared with more traditional steeply sloped roofs.

Flat roof parapet repair.

Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. The slope should be a minimum of 1 in 80 but in practice a minimum slope of 1 to 40 should be used to allow for deflection of the roof and for normal building tolerances. It serves as an extension of the wall by which the roof is supported.

Roof membrane temperatures ottawa canada summer day. Parapet walls are a practical solution for providing a boundary between neighboring properties roofs. As a roof ages the roofing seams begin to separate often beginning where the flat roof meets the parapet wall. 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 walls offer protection against fire because they impede the spread of fire by making a boundary on slanting roof. Many flat and low slope roofs are surrounded by parapet walls. Courtesy of max baker and the national research council of canada. This new torch on flat roof is leaking because the parapet walls and the coping stones are defective water damage to the ceiling below from the leaking ceil.