Metal Roof Cricket Design

The industry rule of thumb is that the cricket panel slope should be twice that of the roof surface slope.

Metal roof cricket design.

Cricket panel slope is typically double the roof surface slope. I just realized potential flashing problem since this is stucco over wood frame chimney. For reroofing though ibc 2012 requires materi. Cricket angle the angle x between corresponding lines ab cricket length and ac cricket valley design guidelines.

Refer to the rain carrying table in this booklet for the maximum allowable panel length per slope that will provide adequate drainage. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. For longer slopes and lower roof pitches contact fabral for other suitable profiles. See more ideas about roof roofing roof repair.

The manufactured slope of the cricket panel. Roof crickets are found on the high side of a chimney or when one roof meets another. 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. Depending on the roof surface slope there is an accepted maximum length to width ratio.

The roof cricket is normally the same pitch as the rest of the roof but not always. Roof crickets can be covered with metal flashing or with the same material as the rest of the roof. If your chimney doesn t have one watch for holes rusting through the flashing. 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.

For the cricket s counter flashing we d have to chip away stucco and tuck the counter flashing underneath the building paper that is behind stucco. Any chimney wider than 30 in. From that high point cricket would also slope down to primary roof at same 4 12 slope. Roof pitch the metal roofing panels shown in this manual require a mini mum slope of 2 per foot to ensure proper drainage.

Previous ibc editions have the same requirement. A properly installed chimney cricket will direct water and debris around the chimney and off the roof. The functionality of the cricket is determined by the cricket valley slope.