Roof Cricket Design Guidelines
Depending on the roof surface slope there is an accepted maximum length to width ratio.
Roof cricket design guidelines. International building code 2012 edition ibc 2012 section 1507 require ments for roof coverings states all membrane roof covering systems except coal tar built up roofs have a design slope minimum of one fourth unit vertical in 12 units horizontal 2 percent slope for drainage. Design guidelines cricket panel slope is typically double the roof surface slope. Roof crickets are found on the high side of a chimney or when one roof meets another. Since roof drains are rarely placed in the lowest point of a structural sloping roof deck crickets are usually needed.
Jun 15 2017 explore anibal carbonell s board roof cricket on pinterest. And many times the pitch rise is called out on the plans in new construction. I e if the roof surface slope is 1 4 ft the cricket panel slope should be 1 2 ft there are exceptions to this rule please call us for further information. Poor cricket design posted.
Previous ibc editions have the same requirement. Properly designed they virtually eliminate ponding see photo 1. See more ideas about roof roofing roof repair. A roof cricket is a ridge structure designed to divert water on a roof.
A general rule for designing sufficient slope in crickets is that its slope shall be twice. The industry rule of thumb is that the cricket panel slope should be twice that of the roof surface slope. Columns beams and supporting walls usually occupy the low points forcing drain placements to be moved further up hill. Roof crickets can be covered with metal flashing or with the same material as the rest of the roof.
The functionality of the cricket is determined by the cricket valley slope. The manufactured slope of the cricket panel. Roof cricket design guidelines i agree there is is no code for the cricket hence my building slightly steeper ones when in snow country or near a tall tree that drops seeds leaves to clog the shorter shallower valley sections of the cricket. Polyiso xps and eps roof insulation all work well with quicket.