Flat Roof Parapet Repair

Parapet walls are a practical solution for providing a boundary between neighboring properties roofs.

Flat roof parapet repair.

Parapet walls offer protection against fire because they impede the spread of fire by making a boundary on slanting roof. 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 gives the roofs of building a flat roof look. It serves as an extension of the wall by which the roof is supported.

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. 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. This video is about making a transition form a flat roof to a parapet wall with taracotta clay caps. Roof membrane temperatures ottawa canada summer day.

As a roof ages the roofing seams begin to separate often beginning where the flat roof meets the parapet wall. Just enough slope to drain water but also flat enough to be a problem if not constructed properly. 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. Courtesy of max baker and the national research council of canada.