Flat Roof Parapet Height

Height of roofing at wall.

Flat roof parapet height.

At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall. The minimum height of a parapet wall above the roof surface is 30 inches. The height of the building is calculated to the highest roof element not the parapet or mechanical protrusions vents chase etc. First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases.

Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection. Also there may be several roof penetrations and other obstacles that should be factored into the measurement. 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. 2015 ibc code commentary.

Minimum of 12 to top of parapet. 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. In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height. The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar.

Measuring a flat roof on a typical commercial building with a parapet can be arduous and complicated. Like any roof with batt. There are several solutions to help you raise the height of your parapet that are cost effective and aesthetically pleasing. Top of parapet below cap to be sealed with fluid applied flashing.