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rutledj 10-31-2012 08:17 AM

ductwork through wall
Can someone tell me the proper way to seal ductwork going through an exterior wall? I am venting a microwave oven through the wall (wood siding). They hole is a bit bigger than the duct and I'm not really sure what you put around the duct pipe to hide/seal that gap.

I've looked at the big box stores and didn't see anything specific for this. Would you just use a flat piece of flashing material, cut a hole as close to the duct size as possible, nail that to the outside wall and chalk any remaining gaps?


GBrackins 10-31-2012 09:24 AM

check this out

rutledj 10-31-2012 09:27 AM

Not exactly what I'm looking for. I'm going through a wall (between kitchen and garage) and then straight up through roof. I need to pretty up (and seal airtight) the area where the duct comes through the wall on the garage side.

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