The new stove won't be grunted up on the hearth until Tuesday or Wednesday but Elk can sleep better knowing that the new sheet metal blocking plate is installed in that fireplace. A foot of rockwool on top of and sealing the damper opening. Sealed steel covering the top of the firebox six inches below that with cemented in 3/8" stove gasket around the pipe to protect it from cuts and leaks. All mortored in with fireplace mortor.