Low Slope Roof Cricket Design

The building owner and roof system designer are responsible for determining the roof assembly s design and method of slope for drainage and the roof deck.

Low slope roof cricket design.

How to build a cricket on a low slope metal roof. Based on our experience and for the sake of argument we believe positive drainage will generally occur when the underlying slope is 1 8 inch per foot. Duration policies for ponding for various roof system types. Slope cricket valley slope cricket angle distance between points 3 and 4 cricket angle 2 the manufactured slope of the cricket panel.

I e if the roof surface slope is 1 4 ft the cricket panel slope should be 1 2 ft there are. Skip navigation sign in. Current practices of commercial low slope membrane roof installation frequently result in up to 50 unnecessary cricket waste. Field cut sumps valleys hips and ridges of tapered insulation sheets also create 50 material waste.

Crickets are a secondary application of tapered insulation used to divert water from rooftop curbs valleys and low points to drains and scuppers. For low slope roofs where a tapered insulation cricket or saddle creates a valley the valley s slope will be less than that of the cricket or saddle. Flat and low slope roof designs to avoid moisture condensation problems flat roofs call up a whole new breed of building moisture problems how to avoid moisture traps under flat roofs avoid mold rot caused by moisture trapped under un vented flat roofs questions answers about the cause cure prevention of moisture problems in flat roofs and similarly hard to ventilate structures. Good questions regarding water and low slope membrane roofs where slope in the structural roof deck may not be adequate.

Polyiso xps and eps roof insulation all work well with quicket. Some ponding water along cricket and saddle valleys typically will occur and should be anticipated. How to build a cricket on a low slope metal roof. The industry rule of thumb is that the cricket panel slope should be twice that of the roof surface slope.

Cricket angle the angle x between corresponding lines ab cricket length and ac cricket valley design guidelines. Polyiso and polystyrene roof insulations work with the crickez system. Depending on the roof surface slope there is an accepted maximum length to width ratio. Cricket panel slope is typically double the roof surface slope.

Crickets figure 2 are most often used in conjunction with two way tapered systems in the low points of the tapered system. The functionality of the cricket is determined by the. The crickez system helps to simplify roof crickets with quicket. It means the roofer had better understand cricket design when the existing slope is less than 1 4 inch per foot and he or she wants to meet the building code.