Wall Thimbal question............

[Fatherof2]

If I were to cut a circular hole in my wall and slide a wall thimbal in, what should I have for clearance between the thimbal and the wall?

Thank you.

 

[TimfromMA]

No clearance is needed between the thimble and wall.

 

[Fatherof2]

Tim, are you rock solid sure on that?

I was just in the local stove store and the guy who works there was telling me that the wall cant be touching the thimbal.

He says that there needs to be a gap between the wall and the thimbal. Mine is not set up that way and I just want to be sure I am OK.

 

[TimfromMA]

The thimble is what maintains clearance between your exhaust pipe and combustibles. You can have sheetrock, insulation, wires or anything else right up against the outside of the thimble with no issue.

 

[joed2323]

I have another question, sorry fatherof2,

Im doing a install also and the wall thimble gap where the 3inch pipe slides into the wall thimble, the o.d. of the pipe should be caulked with hi temp caulking correct? to make it air tight from outside air and whatever other fumes??

Should i also run a bead of hi temp caulking around the 4 corners of the thimble inside and the outside??

 

[Polar Bear]

Hi temp caulking around the exhaust pipe, regular around the thimble.

 

[joed2323]

Sounds good that was the answer I was looking for.

 

[Jason845845]

Also....only caulk the thimble on the outside