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.

Flat roof parapet wall 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. 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. Parapet walls are a difficult detail with a long history of failure.

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. 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. 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. 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. Unlike standard exterior walls parapet walls are exposed to the elements on three sides.

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

Timber frame flat roof detail. To wall sloped roof no overhang ledger support. 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. 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.