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Furnce vent/exaust through attic vapor barrier

jdelisle's Avatar

Join Date: Jul 2008
Posts: 2

07-09-08, 06:29 PM   #1  
Furnce vent/exaust through attic vapor barrier

I'm installing a furnace (high efficiency) and two 2" pipes must enter my attic. This means a hole in the vapor barrier.

What should I use to seal around the pipe? The pipe is rated to 65C / 150F, but would likely be much lower for day to day operation. Would some good old spray foam do the trick?


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airman.1994's Avatar

Join Date: Dec 2005
Posts: 5,578

07-10-08, 07:20 PM   #2  
I no of nothing that will replace the hole in the VB,but Id do the spay foam as well.

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