Parapet Only On Roof

A parapet is a barrier that is an extension of the wall at the edge of a roof terrace balcony walkway or other structure the word comes ultimately from the italian parapetto parare to cover defend and petto breast.

Parapet only on roof. The figure above shows the individual components to be considered in a parapet condition it starts with managing the flow of water on the parapet coping cap which is sloped back to the roof system. Otherwise the required rating only applies to the inside face of the exterior wall. Where extending above a roof a parapet may simply be the portion of an exterior wall that continues above the edge. 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.

Where the roof membrane meets the parapet wall the membrane should be installed to allow for the possibility of differential movement and. The german equivalent brüstung has the same meaning. 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. However when a roof slopes down toward an exterior wall and parapet with a slope greater than 2 12 further analysis is required to determine if a taller parapet is necessary.

Courtesy of max baker and the national research council of canada. This also helps prevent staining on the exterior wall. Roof membrane temperatures ottawa canada summer day. Roofing material must extend up a portion of the parapet wall as well.

Illustrated above is a real time roof measurement of a commercial structure with a parapet wall.