+- Woodnet Forums (https://www.forums.woodnet.net)
+-- Thread: Filling the gap for Range Hood Exhaust (/showthread.php?tid=7341946)
Pages:
1
2
Filling the gap for Range Hood Exhaust - DogwoodTales - 08-24-2018
So I’m installing the exhaust vent for my new range hood and I have a gap between the 6 inch duct and the masonry wall (block wall inside, brick face outside).
Given the potential heat from cooking going through that vent, what would you use to fill that gap?
Thanks, Ray
RE: Filling the gap for Range Hood Exhaust - Stwood_ - 08-24-2018
6" stove pipe I would imagine.
RE: Filling the gap for Range Hood Exhaust - DogwoodTales - 08-24-2018
Hmm... I mean the gap between the exhaust pipe and the masonry wall
Where the pipe/duct passes through the wall
RE: Filling the gap for Range Hood Exhaust - Stwood_ - 08-24-2018
Gotcha. Sorry.
Maybe some woodstove rope seal. Dunno really. Not a lot of heat there.
RE: Filling the gap for Range Hood Exhaust - goaliedad - 08-24-2018
How big is the gap? Silicone? Mortar?
RE: Filling the gap for Range Hood Exhaust - crokett™ - 08-24-2018
(08-24-2018, 04:46 PM)goaliedad Wrote: How big is the gap? Silicone? Mortar?
I used some stove rope gasket as a backer and then mortar to seal around the stove pipe from my woodstove, but that is a lot more heat than a range hood. Silicone should do just fine if the gap isn't too large.
RE: Filling the gap for Range Hood Exhaust - Duane N - 08-24-2018
Depending on the gap size maybe stuff rock wool as a backer and use fire caulking to top it off. I've used various red colors of fire caulking so maybe you can find some to match your brick color. Also, depending on the size of the gap maybe use some double wall pipe (aka "B" vent) then just caulk it to match the brick color. The air gap between the double wall pipe is an insulator for heat.
RE: Filling the gap for Range Hood Exhaust - DogwoodTales - 08-24-2018
Not terribly big. The duct is actually very snug but the hole is not a perfect fitting circle.
I was originally thinking of caulking and/or great stuff spray foam but then was thinking about the heat from the stove and I don’t know how hot cooking temps might make the duct
I’ll have to do silicone caulking along the outer edges for weather proofing but by the inner wall I was thinking that maybe I should do something else more heat resistant
RE: Filling the gap for Range Hood Exhaust - DogwoodTales - 08-24-2018
Well to do the air gap I will have to make the hole larger than the six inches diameter that it is and while I will do that if absolutely necessary I’d rather avoid it if not necessary
It’s a block wall and brick outside so it’s not like I have to insulate it from a wood frame
I’m just thinking about filling the small gaps with something that’s appropriately heat resistant
RE: Filling the gap for Range Hood Exhaust - tomsteve - 08-25-2018
a range hood,correct? one that is generally 26-36" above an oven? if this is the case there shouldnt be any major high temperature heat going through the vent.
polyurethane caulk