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lupeglvn

New Member
May 9, 2026
1
Humboldt County CA
Hi, I purchased an older house that has a classic Hearthstone stove. It's a beautiful stove but after the home inspection it stated creosote build up. I went up on the roof and saw the chimney cap for the wood stove had build up. I have a long drill run brush that has multiple rods that can be attached to create the desired length. Everything went well no issue.

My main question here is that as I was inserting the brush half way down, what I estimate to be where the ceiling is, I felt something that was like a butterfly flap. I did some research online and saw this might be a backdraft damper? I went inside to clean the remaining portion and i could feel the flap moving pretty easily. I was careful to make sure I didn't run the brush will it was inserted past the flap. Anyway, I'm curious if this is just a normal part of how it was set up. I was confused initially since it doesn't appear to be a barometric damper because there is no way to access it and there are no other attachments to the flue it goes from the top of the stove nearly straight up, very slight bend and exits out through the roof like it normally would.

Any feed back would be appreciated. I have yet to light it since it has been sitting a while and I have read you need to build a small fire to dry out the stone. I just want to make sure the damper/flap is a normal part that doesn't need to be maintained etc.

Thanks
 
Hi, I purchased an older house that has a classic Hearthstone stove. It's a beautiful stove but after the home inspection it stated creosote build up. I went up on the roof and saw the chimney cap for the wood stove had build up. I have a long drill run brush that has multiple rods that can be attached to create the desired length. Everything went well no issue.

My main question here is that as I was inserting the brush half way down, what I estimate to be where the ceiling is, I felt something that was like a butterfly flap. I did some research online and saw this might be a backdraft damper? I went inside to clean the remaining portion and i could feel the flap moving pretty easily. I was careful to make sure I didn't run the brush will it was inserted past the flap. Anyway, I'm curious if this is just a normal part of how it was set up. I was confused initially since it doesn't appear to be a barometric damper because there is no way to access it and there are no other attachments to the flue it goes from the top of the stove nearly straight up, very slight bend and exits out through the roof like it normally would.

Any feed back would be appreciated. I have yet to light it since it has been sitting a while and I have read you need to build a small fire to dry out the stone. I just want to make sure the damper/flap is a normal part that doesn't need to be maintained etc.

Thanks
There should be nothing there, could it be a bend? A damper would be visible above your stove. Might be a build up of creosote too!
 
Not familiar with an in line chimney flapper... Did it open fully going from top or bottom? I'm curious, I could see it opening going outward, but possibly not opening going from top down? I would not use the stove until you figure out what that is, perhaps time for a sweep to do a camera look and ascertain exactly what it is. Good luck.
 
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What type of chimney? Is it lined or unlined? Could it be an old fireplace damper that was not properly removed when the stove was installed?