I'm back from vacation, ready to make some progress and move forward. I will be ordering materials for the thermal break soon: Ceramic rope and sealant. I plan on having a 1/2" horizontal and a 1/4" vertical thermal break gap. I plan to use 1/2" and 3/4" rope in these gaps and fill the 1/4" gap with the sealant inside the smoke chamber/chimney. I think the below mentioned materials will work and the price is reasonable............ Any thoughts or suggestions is appreciated.

Ceramic rope
Sealant
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