Flat Roof Parapet Height

Like any roof with batt.

Flat roof parapet height.

The assembly is straight forward but what complicates matters is that the roof needs to be vented. 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. First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases. Height of roofing at wall.

The minimum height of a parapet wall above the roof surface is 30 inches. The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar. There are several solutions to help you raise the height of your parapet that are cost effective and aesthetically pleasing. The parapet height may have to have a minimum height if it is part of a fire rated assembly between units depending upon the use and classification of the structure.

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. Top of parapet below cap to be sealed with fluid applied flashing.

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. 2015 ibc code commentary. The height of the building is calculated to the highest roof element not the parapet or mechanical protrusions vents chase etc. Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection.