2 fireplaces, 1 flue - smoke leak
I have 2 fireplaces, 1 on 1st floor and 1 directly below it in the basement.
Both are on the same flue/chimney. When I have a fire upstairs there is significant smoke seepage into the basement. The only solutions that worked were a chimney balloon, with limited success and need to re-inflate constantly, and current mode of sealing it up with insulation panels/caulking.
That’s a short-term fix. Would love to use this fireplace but the balloon is a mess to insert/remove constantly. Would new doors with gaskets work? Currently has the standard glass bi-folds (pro baby builder grade).
Looking to stop the seepage but keep the fireplace functional. Willing to do some adjustments on use each time but chimney balloon is not idea.
Note: This isn’t an issue with priming, I’m well aware of doing that properly.