Minimum Parapet Height Flat Roof

I ve seen numerous references to a minimum flashing height of 8 inches for flat roofs yet when i look at some roofs and photos of roofs i see skylights with curbs that are way less than 8 inches high.

Minimum parapet height flat roof. The minimum height of a parapet wall above the roof surface is 30 inches. See attached pic for an example. Since workers need to access the roof dur. Bs 6229 2003 flat roofs with continuously supported coverings code of practice and bs 8217 2005 reinforced bitumen membranes for roofing code of practice both state that if unwanted water ingress into the building is to be avoided all weatherproofing upstands occurring around the roof area.

Parapet corrective work must be performed in conjunction with the installation of tension roof anchors. The height of a planned parapet is made during the conceptual design of a building. If a reinforced concrete beam is provided at the top of the wall the minimum height above the wall anchor may be 6 inches 152 mm. Install a non penetrating full height railing.

What s the real story on minimum flashing height. 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. Some look like they re maybe 4 inches or so. We offer railings that attach to the top of the parapet.

The roof was completely flat all the way to the edges and did not have a parapet. Which would include abutments rooflights. 2015 ibc code commentary. If penetrating the outside of the wall is not an option a freestanding non penetrating railing can be used to keep people back to from the roof edge.