Flat Roof Parapet Wall Detail

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. 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. 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.

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Flat roof parapet wall detail.

Parapet walls are a difficult detail with a long history of failure. See more ideas about parapet architecture details construction drawings. Courtesy of max baker and the national research council of canada. 100 dan road canton ma 02021 phone 1 800 451 2504 sales 1 800 576 2358.

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 detail masonry cavity wall flat roof insulation above and between joists. That will help you remember certain factors and details to build the best possible flat roof. Timber frame flat roof detail.

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. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. 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. 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.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. Nov 30 2014 explore alex radford foster s board parapet detail on pinterest. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. Unlike standard exterior walls parapet walls are exposed to the elements on three sides.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. 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. 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.

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