Metal Roof At Parapet With Crickets

Reinstall the roof panel under the cricket snapping its seams back in place.

Metal roof at parapet with crickets.

To determine how high a cricket needs to be chesney says his company makes a mock up with string. Caulk the joints where the cricket meets the panel and the chimney as well as the screw heads. If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4. A roof with a 12 12 roof slope should have a cricket that is at least half as tall as the width of the chimney or other protrusion.

You can spot the roof crickets on the chimney high or on the intersection between roof areas normally the roof cricket will be designed in the same pitch as the roof but it is not always necessary. The additional insulation thickness may require increasing some parapet and curb heights. Fastening treated 2 6 nailers on top of existing curbs or parapets may help re roofs to accommodate the added thickness. In instances where metal roof systems are installed on structures that have parapet or adjoining walls a two piece flashing is used for the parallel transition.

Courtesy of max baker and the national research council of canada. Smaller crickets are covered with metal flashing and larger ones can be covered with the same material as the rest of the roof. Especially is true at parapet walls and copings and roof edges where edge metal shapes are fastened to wood blocking. Tapered roof insulation and crickets are designed to provide effective drainage for.

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. When water runs off the parapet coping and onto the roof it must be directed off it with slope and crickets. Adding a second roof is the easiest for simple conditions typical flat roof at a parapet for example but when you have to add a cricket at the point where a roof with a slight curve to it meets another sloped roof and a vertical face you re gonna have to be pretty good at the maths if you want to try and get a second roof placed correctly. For a roof slope of 3 12 the cricket needs to be 1 8 the width of the protrusion.

The greatest potential for leaks is where the parapet wall meets the roof deck. Cricket is a framed wooden in triangular form that installed over the pitched of flat roof. Water must not be allowed to collect and pond against a parapet wall where it could leak into a building s interior. In this detail the metal base flashing assembly is secured directly to the parallel metal panel and set freely up the wall.

Metal panel and spf roof systems 2012 333 spf roof systems.