Parapet Roof Height

If you can penetrate your roof parapet there are several roof parapet railing solutions.

Parapet roof height.

Roof membrane must lap up wall to minimum of 12 above roof plane or per specifications whichever is greater. 2015 ibc code commentary. With it parapet walls are indicated automatically on the roof sketch as flattened panels similar to an unfolded pizza box. Minimum of 12 to top of parapet.

If the criteria indicated below cannot be attained design calculations should be submitted to indicate suitability. Install a non penetrating full height railing. This is the simplest solution. Courtesy of max baker and the national research council of canada.

Roof membrane temperatures ottawa canada summer day. Insulate within parapet wall cavity to depth of roof insulation if present. 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 thickness and maximum height of parapet walls should be as indicated in the diagram below.

Accounting for roof penetrations when dealing with parapet walls the extra material needed to cover the vertical surface of the inside face of the parapet isn t the only added factor to take into consideration. Height of roofing at wall. If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4.