Roof Crickets For Three Drains

Tapered roof insulation and crickets are designed to provide effective drainage for epdm tpo pvc and built up bur membranes.

Roof crickets for three drains.

P 1503 4 1 secondary emergency overflow drains or scuppers. Flintboard pre cut crickets installation instructions note. Snap a line between drains. In roof deck constructions that comply as an assembly with fm 4450 or ul 1256.

But many contractors and some design professionals do not understand the mechanics of proper cricket design. Because your roof plays such a central role in protecting your home and contributes so significantly to its curb appeal roof crickets are important structural elements to consider in the design of your roof. Smaller crickets are covered with metal flashing and larger ones can be covered with the same material as the rest of the roof. The processes described however applies to crickets of all sizes.

Polyiso xps and eps roof insulation all work well with quicket. Instead a roof cricket is an important structural element in a properly designed and installed roofing system for roofs that include chimneys and certain types of roof transitions. Crickets also known as saddles are structures built between roof drainage points to move water laterally across the roof diverting it to the drainage points. Where roof drains are required secondary emergency overflow roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason.

Cricket panel slope the slope of the cricket panel. Roof surface slope the slope that is in the structural deck the slope created by tapered insulation or a combination of the two. A cricket or saddle is a ridge structure designed to divert water on a roof around the high side of a chimney or the transition from one roof area to another the cricket is normally the same pitch as the rest of the roof but not always. Smoke developed values do not apply to roofing.

The following instructions apply specifically to a 50 cricket. Properly designed they virtually eliminate ponding see photo 1. Cricket width points c to d generally the shorter of the 2 cross sections. Crickets can be constructed of wood concrete.

Cricket length points a to b generally the longer of the 2 cross sections.