Flat Roof Parapet Height

Do not lap tpo over top of parapet unless required by unique construction conditions.

Flat roof parapet height. 2015 ibc code commentary. In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in 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. Minimum of 12 to top of parapet.

First of all commercial and multi unit residential buildings are a lot bigger than single family homes in most cases. 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. 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.

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. Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection. Like any roof with batt.

The assembly is straight forward but what complicates matters is that the roof needs to be vented. The height of the building is calculated to the highest roof element not the parapet or mechanical protrusions vents chase etc. Measuring a flat roof on a typical commercial building with a parapet can be arduous and complicated. Top of parapet below cap to be sealed with fluid applied flashing.