Main thing to worry about is any holes. I laid our hearth with it (not real fire) and lost the first batch completely into the floor. Expanding foam and caulk were my friends after that.
Yeah good point. Got a few cracks to fil with epoxy and some foam strips. I need to do 10m2
@skinny started
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Main thing to worry about is any holes. I laid our hearth with it (not real fire) and lost the first batch completely into the floor. Expanding foam and caulk were my friends after that.