![flash around a round chimney on a metal roof flash around a round chimney on a metal roof](https://inspectapedia.com/chimneys/Stone-Chimney-Flashing-Leaks-384-Todd.jpg)
“And a saddle is just two crickets put back to back, or a pyramid-looking structure.” Rupar says sometimes contractors use the terms cricket and saddle interchangeably, but they have slightly different meanings in “The NRCA Roofing Manual.” “A cricket is basically two sloping planes joined at a ridge,” he says. In describing crickets, it’s also useful to consider some terminology. Many of NRCA’s recommendations are more conservative or more robust than the minimum requirements in codes.” Rupar says, “In our manual, we say that if you have a penetration that’s 2 feet or wider across, and it’s on a roof on a curb that’s going to get in the way of water draining, you should probably put a cricket behind it.
FLASH AROUND A ROUND CHIMNEY ON A METAL ROOF CODE
Any wide penetration, not just a chimney, that gets in the way of runoff is where you would put a cricket.”įor projects required to follow it, the 2018 International Building Code (IBC) and 2018 International Residential Code for One- and Two-Family Dwellings (IRC) specifies crickets for protrusions 30 or more inches wide, parallel to a ridge. Or maybe directing to different drains or sections of gutter. They can be used where mechanical units protrude from roofs, at wide decks and other locations.įor instance, Maciek Rupar, director of technical services at National Roofing Contractors Association (NRCA), says, “If water is being channeled to a valley that for some reason can’t handle the amount of runoff, then you use a cricket to split it or divide it into separate avenues for it to run.
![flash around a round chimney on a metal roof flash around a round chimney on a metal roof](https://thumbs.dreamstime.com/b/brick-chimney-metal-roof-house-205903171.jpg)
Specifically, crickets are pyramidal forms that divert water around the upside of chimneys and other roof penetrations. In terms of preventing wind and water damage, it’s critical that crickets are high enough with a proper slope, made with the right materials, and sealed and installed correctly. Roof crickets are a specialty flashing detail.