I just poured a 3" pad yesterdayon top of 7" of structural concrete, perfectly level but.. as the pad dried some loose vermiculite kind of floated to the top & now I have some voids on the surface. they're around theedges of the pad & dont matter structurally but I worry about some hot spots when I lay the floor. Should I patch themwith more verniculite concrete, they're about 1/4" deep? Should I skim a veneer of refrax mortar over the top to make it flat again? Or should I just forget about it
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