I see daylight thru the newly installed thimble.

[BKSinAZ]

Just had the new Harmon XXV free standing stove partly installed yesturday. Where the 4 inch pipe slides thru, I can see day light from inside the house. I am going to assume that the installer did not caulk around the pipe.... correct me if I am wrong.

My question is what kind of cualk do I buy? I will guess a hi temp type, right? Do they make these hi temp caulks in black and silver colors? Will these hi temp caulks stand up to outdoor climates?

 

[Jason845845]

Use high temp rtv sealant on the outside thimble only. I've seen red, black and clear.

 

[BKSinAZ]

Use high temp rtv sealant on the outside thimble only. I've seen red, black and clear.

When you say to use the high temp rtv sealant on the outside thimble only, you mean the thimble on the outside of the house, right?
What do I do about the gap on the inside of house portion of thimble?

 

[smwilliamson]

High temp clear or black on the outside.

 

[smwilliamson]

When you say to use the high temp rtv sealant on the outside thimble only, you mean the thimble on the outside of the house, right?
What do I do about the gap on the inside of house portion of thimble?

The gap allows hot air to escape

 

[BKSinAZ]

The gap allows hot air to escape

The gap on the inside portion of thimble(inside of house) is for heat to escape??? Heat to escape out of the house? Hat does not make sense to me.

 

[Jason845845]

The gap on the inside portion of thimble(inside of house) is for heat to escape??? Heat to escape out of the house? Hat does not make sense to me.

Heat to escape out of the thimble and back into the house.

 

[smwilliamson]

Heat to escape out of the thimble and back into the house.

So there is not a buildup of heat inside the wall.

 

[Maringotka]

So, I’m thinking, when you install a thimble that accommodates single wall stove pipe through the thumble, the stove pipe should not fit snugly in the thimble. What amount of clearance should there be around the single wall stove pipe?

 

[zrock]

Depends on the manufacturer mine is sealed to the pipe on inside of house via clamp and the outside is a tight fit no clamp.. I sealed around pipe with silicone inside and out and then sealed to the house with normal household calking. You should be seeing 0 daylight

 

[Ssyko]

Mine is double wall pipe and i sealed the area around the pipe with high temp silicone. Are you using single wall vent pipe?

 

[Maringotka]

Mine is double wall pipe and i sealed the area around the pipe with high temp silicone. Are you using single wall vent pipe?

Yes. I’m using single wall stove pipe throughout the installation.

 

[Ssyko]

Supposed to be double wall to meet code. Thats why there’s a gap

 

[begreen]

Yes. I’m using single wall stove pipe throughout the installation.

This is for a wood stove, right? If so, wrong forum.

 

[Highbeam]

You can get high temp rtv in several colors. Just go look at the auto parts store. Copper, blue, red, black, grey, etc. clear of black would look best and for crying out loud do a clean install. I hate seeing a fat finger mark slipping in way too much sealant.

 

[begreen]

Don't use the blue stuff. It turns solid as a rock when heated at flue temps. I learned this the hard way. It made later servicing a real pain.

 

[Maringotka]

This is for a wood stove, right? If so, wrong forum.

Sorry, which form should be used?

 

[begreen]

Sorry, which form should be used?

The main Hearth Forum is for wood stoves and fireplaces. You already have multiple postings in the main hearth forum on this topic.