Metal Roof Chimney Cricket. A roof cricket is a sloped backing that diverts water away from the chimney and down the roof. After the structure of the chimney cricket has been built metal valleys should be used as flashing.
When a cricket is built properly it will shed water away from the chimney and down the sides of the roof rather than seeping between flashing and into an attic or ceiling area. This can cause wood and siding damage around the bottom perimeter of your chimney along with roof leaks. Generally the steeper the roof slope is the wider the cricket should be.
Lastly the roofers will install the shingles and the cricket will divert water.
Generally the steeper the roof slope is the wider the cricket should be. The junction between a roof and a chimney or skylight is one of the most prone to leak in a roof. This can cause wood and siding damage around the bottom perimeter of your chimney along with roof leaks. During installation the roofer incorporates the chimney cricket into the chimney flashing system.
