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Mortared Bluestone base - concrete or gravel?
we've installed our mortared bluestone/flagstone on 6" compacted gravel bases in the past. a prominent stone supplier here recommends this method. I have however heard of guys laying mortared stone on concrete pads, which of course sounds a lot sturdier. what are your thoughts on base prep for mortared flatwork? (we are in Michigan, so frost/freezing is a big concern)
thanks,
jim
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