Installing an insert
I have an electric insert that we just had sitting in the firebox, but due to some water issues in the room it was figured out that the existing chimney wasn’t anchored to the house and was leaning away.
It was removed but the damper is still in tact so there is about 8-10 courses of brick with a sandstone slab on top.
They filled the space above the damper with clay. I’m trying go frame the insert in but have a lot of moisture or condensation.
How do I go about sealing the inside of the firebox?? I used furnace cement and coated all the surfaces but still have moisture coming thru the cement from the bottom up about 4” in a few spots.
Should I be using something different or what other options do I have?
I’m going to fill the open space with Roxul but I would like to know that there isn’t any moisture before I move forward.
Thanks in advance for any ideas