Round vent/square chimney

[Skyview Farm]

Hey everyone - I am new to the forum and wood stoves, but was excited to have an earth stove in the basement when I bought my house years ago. I saw the soot coming down the wall, which has made me hesitant to start a fire, so I pulled back the collar to inspect. There was cracked mortar breaking off around the vent pipe that sealed this gap connecting the round pipe to the square tile chimney. I removed the mortar and am trying to find the best way to seal this gap around the pipe. I bought some refractory cement, but am thinking that is what was done before. I would appreciate any ideas.

 

[rwhite]

This is just a guess, but it looks like a 6" pipe is just slid into a 8" chimney tile. The problem with filling the gap is that creosote that is running down the wall will be trapped and likely create a bigger hazard. I think you are going to need to find a way to properly line the entire chimney.

 

[Skyview Farm]

You are correct, a 6" round pipe with a 7" square chimney tile. The pipe ends where the chimney tile goes vertical, about a foot in, and is not lined up the chimney. Is lining the chimney the only option? I am seeing lots of dollar signs. Still more affordable than the alternative of having my house burn down I suppose.

 

[bholler]

You are correct, a 6" round pipe with a 7" square chimney tile. The pipe ends where the chimney tile goes vertical, about a foot in, and is not lined up the chimney. Is lining the chimney the only option? I am seeing lots of dollar signs. Still more affordable than the alternative of having my house burn down I suppose.

There are not even any clay liners in it?

 

[rwhite]

There are not even any clay liners in it?

I'm hoping by not lined you mean not a steel liner but has a clay liner. That set up you have is unsafe and needs corrected.

 

[begreen]

That is an odd thimble and begs the question whether something else is odd. Does the square tile thimble tie flush into a clay tile lined chimney?

To fill the gaps I would try 7/8" stove door gasket material.