sand and concrete mix
I just ordered your book and am looking forward to reading it. I am undertaking a flagstone project this year in my backyard where I will be covering some existing concrete patio and also laying flagstone or slate in dirt/previous yard. I live in the NW where we do get freezing and thawing cycles therefore I am going to be using the sand techique. Is it okay to lay flagstone over existing concrete using the sand technique or am I better off with hard mortar?
Does the book explain this clearly? Thanks