Flat Roof Parapet Repair

Just enough slope to drain water but also flat enough to be a problem if not constructed properly.

Flat roof parapet repair.

It serves as an extension of the wall by which the roof is supported. 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. This video is about making a transition form a flat roof to a parapet wall with taracotta clay caps. Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot.

This gives the roofs of building a flat roof look. Parapet walls are a practical solution for providing a boundary between neighboring properties roofs. Many flat and low slope roofs are surrounded by parapet walls. As a roof ages the roofing seams begin to separate often beginning where the flat roof meets the parapet wall.

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. Courtesy of max baker and the national research council of canada. Roof membrane temperatures ottawa canada summer day. If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4.