Closed cell spray foam against residential kitchen stove exhaust pipe?
kevinkeegan
| Posted in GBA Pro Help on
I recently had closed cell spray foam installed and where the kitchen stove exhaust pipe passes into exterior joist bay, closed cell spray foam got on the exhaust pipe and before I close the ceiling I want to make sure the heat from the cooking is not going to create a problem either from the heat or a smell if the warm air causes the foam give off an odor?
Thank you
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Replies
If this "kitchen exhaust pipe" is from a range hood (or similar "suck out the cooking fumes" gizmo over the stove", then no, it's not going to be a problem -- that "pipe" is never going to get hot enough to be a problem, it's not a flue pipe. Exhaust hoods typically just use thinwall ductwork, since they aren't very critical. While that duct is likely to get a little warmer in use, it probably won't get much above room temperature at most, which isn't going to be any issue for spray foam.
If this "pipe" is for COMBUSTION GASES and is a FLUE PIPE, then you have a problem -- code requires a 1" minimum seperation in that case, unless using a noncombustible insulating material like mineral wool. I doubt this is the case here though.
Bill