Flat Roof Parapet Height

It is used at a single ply roof membrane sloped per foot to a gutter like on the bainbridge residence that we designed and built above.

Flat roof parapet height.

Like any roof with batt. Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection. Top of parapet below cap to be sealed with fluid applied flashing. The height of the building is calculated to the highest roof element not the parapet or mechanical protrusions vents chase etc.

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. Also there may be several roof penetrations and other obstacles that should be factored into the measurement. Do not lap tpo over top of parapet unless required by unique construction conditions. Measuring a flat roof on a typical commercial building with a parapet can be arduous and complicated.

Minimum of 12 to top of parapet. At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall. Height of roofing at wall. In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height.

First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases. 2015 ibc code commentary. The assembly is straight forward but what complicates matters is that the roof needs to be vented. The minimum height of a parapet wall above the roof surface is 30 inches.