Flat Roof Parapet Wall Detail

Free cad dwg download of a parapet wall to be used in your roof design cad drawings.

Flat roof parapet wall detail.

Roof membrane temperatures ottawa canada summer day. Nov 30 2014 explore alex radford foster s board parapet detail on pinterest. 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. Parapet walls are a difficult detail with a long history of failure.

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. Exterior wall parapet rafters prep. Flat roof detail masonry cavity wall flat roof insulation above and between joists. See more ideas about parapet architecture details construction drawings.

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. 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. Timber frame flat roof detail.

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. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. 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. Ultimately a flat roof should play a part in a total architectural composition and has the ability to enhance the aesthetic and practical outcomes of a home.

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. Timber frame flat roof detail. Flat roofs come in many shapes and sizes which include parapet roofs roof decks and green roofs to name just a few of the options available. 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.