Minimum Parapet Height Flat Roof

Terminate roofing on parapet wall with mechanically fastened termination bar.

Minimum parapet height flat roof.

E slopes 0 12 through 5 12 multiple unit roof coverings. Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications whichever is greater. If you can penetrate your roof parapet there are several roof parapet railing solutions. Roof parapet min 39.

Install a non penetrating full height railing. 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 minimum height of a parapet wall above the roof surface is 30 inches. See attached pic for an example.

Why do we need flat roof upstands. 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. Which would include abutments rooflights. The roof was completely flat all the way to the edges and did not have a parapet.

Parapet corrective work must be performed in conjunction with the installation of tension roof anchors. 2015 ibc code commentary. The overflow must be a minimum 25mm below the top of the 150mm upstand height. The minimum height of a parapet above any wall anchor shall be 12 inches 305 mm.

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. Since workers need to access the roof dur. Such as on a balcony or roof terrace with a parapet. Some look like they re maybe 4 inches or so.

Insulate within parapet wall cavity to depth of roof insulation if present. Employees shall be protected from falls from roofs that are of a height of more than 20 feet by the use of a roof jack system as provided in section 1724 a a minimum of 24 inch high parapet or other method affording equivalent protection. 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. The waterproof membrane extends 150mm height in the door reveal and roof abutment wall adjacent.

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.