thru the wall chimney for thick wall

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cstolten

New Member
Apr 12, 2015
1
Parker, CO
I would like to install a small wood stove in my basement that I am remodeling. The only chimney that will work is the thru the wall type. The wall is 8" thick concrete with a 2x4 framed wall in front of that. The distance from the concrete to the face of the 2x4 is 4.5". We want to install 1/2" board on that with decorative stone or tile. Total wall thickness would be approx 14" to 15". The thru the wall kits I find are made for 6" to 9" thick walls.
Looks like the section of triple wall that attaches to the T and runs into the house comes in either a 9" or 12" length. Can I buy a longer section of the triple wall and cut it to length? Installation will be inspected.

Thanks!
 
Welcome. You can't cut the class A pipe, but you can put in an 18" piece that projects past the wall a few inches.
 
Ventis makes a telescoping section of class a i dont know of any others that do yet.
 
bholler said:
Ventis makes a telescoping section of class a i dont know of any others that do yet.
Click to expand...
Excel has made a telescoping section for many years. I've seen it from Selkirk or dura-vent as of more recently. I can't remember which one, maybe both.

It's just necessary, get an 18" section for the Tee snout. Just allow the excess to protrude through the thimble and paint it black.
 
webby3650 said:
Excel has made a telescoping section for many years. I've seen it from Selkirk or dura-vent as of more recently. I can't remember which one, maybe both.
It's just necessary, get an 18" section for the Tee snout. Just allow the excess to protrude through the thimble and paint it black.
Click to expand...
Yeah i would just use an 18 also no need to make it fit exact many wall pass thru kits come with a cover anyway. Like i said i didn't know of any others i didn't mean that there were not others i guess i said it wrong
 
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What kind of diameter hole do you have to drill through the concrete for 6" Class A? 8"? That'd take a pretty big drill. I drilled a 4" hole, and it went smooth. I drilled from the inside out, but I stripped off the wall covering in the vicinity and funneled the drilling water to a bin with some sheet plastic. I drilled from inside out because I wanted to locate the hole exactly, but outside in would be less messy, but some water would pour down the inside of the wall when you broke through. Sorry if none of this is relevant.
 
you could drill any size hole you want all in one shot you'd just need to rent a core driller or call a core drilling company. The company I used to work for did this, should be fairly reasonable and way less headache than trying to use any kind of smaller hammer drill.
 
a series of small tightly grouped holes in a circle then hit with a hammer works well for getting through concrete as well if you can't get a coring company.
 
I'm not sure if the local rental place had an 8" core drill. Maybe, not sure. The 4" hole I drilled went very smoothly.
 
We rent a core drill from our local rental store on occasion. They have an 8" bit. It's made for floor drilling, so it takes some figuring to bolt it to the wall, but it's not too bad.
 
edyit said:
a series of small tightly grouped holes in a circle then hit with a hammer works well for getting through concrete as well if you can't get a coring company.
Click to expand...
I'd pay to see this! I don't see this being possible on an 8" thick reinforced concrete wall.
Cement block sure, but not poured cement. No way!
 
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webby3650 said:
I'd pay to see this! I don't see this being possible on an 8" thick reinforced concrete wall.
Cement block sure, but not poured cement. No way!
Click to expand...
Yeah not gonna happen i have done it drilling holes and then using a demo hammer to remove the center and a grinder for the rebar but it takes a long time and is not easy.
 
no its not easy, getting through thick concrete walls never is, but if you can't get a core driller what else do you do?
 
velvetfoot said:
I'm not sure if the local rental place had an 8" core drill. Maybe, not sure. The 4" hole I drilled went very smoothly.
Click to expand...
anything over 4" would most likely require a wet core driller
 
webby3650 said:
We rent a core drill from our local rental store on occasion. They have an 8" bit. It's made for floor drilling, so it takes some figuring to bolt it to the wall, but it's not too bad.
Click to expand...
you just need to hammer a lag and bolt to wall that's all, pretty simple just heavy to lift!
 
jb6l6gc said:
you just need to hammer a lag and bolt to wall that's all, pretty simple just heavy to lift!
Click to expand...
Well there's 4 bolts and they must be in exact locations. Then you have to figure out a way to contain the water and cement slurry.
 
jb6l6gc said:
anything over 4" would most likely require a wet core driller
Click to expand...
I used a lightweight Husquvarna diamond wet core drill. I only recall drilling one hole, but it was lightweight, as I said. The larger ones I saw would've needed at least two people to mount on the wall.

I captured the drilling slurry with plastic,which acted like a big funnel into a plastic tote.

I documented it in my boiler install thread, but again, it was only a 4" hole and a lightweight drill:
https://www.hearth.com/talk/threads...150-install-thread.126328/page-2#post-1735522
 
webby3650 said:
Well there's 4 bolts and they must be in exact locations. Then you have to figure out a way to contain the water and cement slurry.
Click to expand...
chemical spill sock would work
sock%20absorbent%20oil.jpg

like I said still not that hard used to do this stuff for a living!
Also 4 bolts isnt always true Milwaukee ones we used to use only had one bolt and a leverage system that held it in place.
 
jb6l6gc said:
Also 4 bolts isnt always true
Click to expand...
True. You don't always get expert help from the hardware store's rental department. I was told that multiple bolts needed to be installed, which wasn't true. They were pretty heavy though!
 
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