Best way to seal existing chimney port

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fig
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Post by fig » Sat. Nov. 21, 2020 11:49 am

Howdy folks.

I need to hook up a stove in the basement and I have a port in the masonry chimney upstairs I need to seal. I’m looking for suggestions. Never done it.

It was sealed before and I opened it up late last winter to bring a stove upstairs. They just had plaster over it so it’s probably a good thing I opened it back up because I’m not sure I like just plaster sealing it. However, I know nothing about it so maybe that’s acceptable.

At any rate I’m open to ideas.

Thanks

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freetown fred
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Post by freetown fred » Sat. Nov. 21, 2020 12:43 pm

F, plaster, crete--whichever--it'll be fine

 
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Lightning
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Post by Lightning » Sat. Nov. 21, 2020 12:44 pm

How permanently do you want to seal it?

 
fig
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Post by fig » Sat. Nov. 21, 2020 1:10 pm

Well I may need it in future.


 
freetown fred
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Post by freetown fred » Sat. Nov. 21, 2020 2:20 pm

No problem if ya use sakrete over it--a lil tappin with a hammer will loosen it up& remove crete if needed. In the meantime, she'll be air tight.

 
fig
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Post by fig » Sat. Nov. 21, 2020 2:37 pm

Should I leave the cap on I wonder and just go over it?

 
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Pauliewog
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Post by Pauliewog » Sat. Nov. 21, 2020 6:26 pm

Looking at the picture you posted. I would just run a bead of high temp black silicone or furnace cement around the edge of the cap and hang decorative cover over it for future use.
Paulie

 
freetown fred
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Post by freetown fred » Sat. Nov. 21, 2020 6:53 pm

Yep, leave cap where it is.


 
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warminmn
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Post by warminmn » Sat. Nov. 21, 2020 8:07 pm

In the olden days people used to paint things on the covers for decoration, or hang a store bought cover that hung over it to hide it. Or you can hang a picture of whatever over the cover if you are worried about looks. Anyway, here are some examples of what Im talking about for flue covers if you want an antique look on the spot. https://www.ebay.com/sch/4043/i.html?_from=R40&_n ... flue+cover

 
fig
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Post by fig » Sat. Nov. 21, 2020 8:24 pm

Yeh I remember my parents house had one with a winter cabin scene on it.

Problem is my port is a clay tile and the diameter is slightly larger then the cap. It’s just sitting loose in there at the moment. It wouldn’t take much to blow it out.

Maybe I should stuff it with chicken wire and then cover it with cement.

I opened it up last year when I needed a stove upstairs and it had some kind of fabric stuffed in it with the plaster over that. I think it must have been some form of asbestos. Otherwise it’s a nice port.

I just missed a deal on a Glenwood cookstove for $350. I was the second caller. They said it was mine if the first passed. Oh how I prayed they passed but they didn’t. It was a beauty too. If I had gotten it I’d be using that port for it as it’s in the kitchen and I’d be running class A from the basement to the roof.

I guess it’s a blessing that I didn’t get it because I really can’t afford it right now. I’ve only worked 7 months this year due to covid crap. A bag of sakrete is much cheaper.

 
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Post by franco b » Sat. Nov. 21, 2020 9:36 pm

Coat the flange with furnace cement ant push it in.

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