Flat Roof Parapet Wall Detail

Furthermore parapets are often inadvertently connected to interior space via balloon framing gaps in structure or penetrations for wiring and mechanicals introducing warm moist interior air into the assembly and potential condensation.

Flat roof parapet wall detail.

While a roof parapet wall may seem like a small detail in the grand scheme of the entire building design it can actually change the dynamic of an entire roof both in terms of cosmetic detailing and safety. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. Traditionally constructed parapet walls can become saturated with rain and are also subject to extremes of heat and cold leading to expansion of the masonry. Flat roof detail masonry cavity wall flat roof insulation above and between joists.

Courtesy of max baker and the national research council of canada. Unlike standard exterior walls parapet walls are exposed to the elements on three sides. The parapet wall needs to be tall enough for both the base flashing and the cap flashing to work together and provide the required venting. That will help you remember certain factors and details to build the best possible flat roof.

Parapet detail masonry cavity wall flat roof with parapet insulation above joists. Roof detail drawings includes jpeg dxf and dwg cad via download a selection of roof detail drawings including flat roof details pitched roof details mansard roof detail parapet verge ridge and eaves details. A parapet roof is simply put when a building s outermost walls extend upwards past the roof around the edges most often by a few feet. Roof membrane temperatures ottawa canada summer day.

Parapet walls behave differently to conventional cavity walls because of their location at the very top of a building where both skins of the parapet are outer skins and as such are exposed to moisture. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. Nov 30 2014 explore alex radford foster s board parapet detail on pinterest. 100 dan road canton ma 02021 phone 1 800 451 2504 sales 1 800 576 2358.

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. Timber frame flat roof detail. The drawing below shows how the parapet wall meets with the sloped roof note that the flashing extends up the parapet wall a minimum of 8.