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.

Flat roof cricket detail.

Quicket can be installed between two layers of roof insulation or placed under an approved cover board. Roof crickets can be covered with metal flashing or with the same material as the rest of the roof. Roof crickets are found on the high side of a chimney or when one roof meets another. 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.

And 1 2 per ft. Cricket size and shape is important. The roof cricket is normally the same pitch as the rest of the roof but not always. Depending on the roof surface slope there is an accepted maximum length to width ratio.

A roof cricket is a ridge structure designed to divert water on a roof. Base flashing for shingles can also be 16 oz but for slate or tile roofs 20 oz. Do not check build roof planes. Select build roof build roof from the menu and in the build roof dialog specify the pitch framing and any other attributes that you will need for the cricket.

Apron and cap flashing should be of at least 16 oz. The functionality of the cricket is determined by the cricket valley slope. The industry rule of thumb is that the cricket panel slope should be twice that of 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. 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. Long and narrow crickets may create larger areas of water that ponds. Cricket panel slope is typically double the roof surface slope.

Hold your cursor over the file name to view when a drawing was last updated. A length to width ratio of 2 to 1 can maximize water flow especially when deck slope is 1 4 inch per foot 2. 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 manufactured slope of the cricket panel.