Flat Roof Cricket Detail

The roof cricket is normally the same pitch as the rest of the roof but not always.

Flat roof cricket detail. Firestone has developed cad drawings of its epdm installation details to assist roofing professionals with the specification of firestone epdm roofing systems. Roof crickets are found on the high side of a chimney or when one roof meets another. A length to width ratio of 2 to 1 can maximize water flow especially when deck slope is 1 4 inch per foot 2. Depending on the roof surface slope there is an accepted maximum length to width ratio.

If the chimney is entirely on one side of the ridge a copper cricket must be used on the high side to divert the water to either sloped side. They are available in 1 4 per ft. 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. The industry rule of thumb is that the cricket panel slope should be twice that of the roof surface slope.

Cricket valley slope is independent of the cricket material slope. Quicket can be installed between two layers of roof insulation or placed under an approved cover board. Do not check build roof planes. A roof cricket is a ridge structure designed to divert water on a roof.

Cricket size and shape is important. The detail drawings are grouped by detail type and can be downloaded below in dwg or pdf format. Base flashing for shingles can also be 16 oz but for slate or tile roofs 20 oz. Cricket panel slope is typically double the roof surface slope.

In this example a pitch of 12 12 and 1 1 2 x 5 1 2 rafters are specified. 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. Find a pro certainteed flintboard pre cut polyisocyanurate roof crickets are pre packaged in triangular sections only not the entire cricket each with a right angle to align with certainteed s standard 4 x 4 tapered flintboard insulation panels. The functionality of the cricket is determined by the cricket valley slope.

Hold your cursor over the file name to view when a drawing was last updated. The manufactured slope of the cricket panel. Apron and cap flashing should be of at least 16 oz. Roof crickets can be covered with metal flashing or with the same material as the rest of the roof.