Flagstone Over Concrete
I am re-laying flasgtone over an existing concrete patio. I had to pull the entire thing up as all of my joints were crumbling and the flasgtone was no longer adhered to the mortar base.
Some of the pieces that I have are only 1/2" thick. I was originally going to replace all of these pieces with 1" thick.
My questions is, can I still use the 1/2" thick flasgtone when mortaring back onto the concrete? Or will that be too thin and present a problem in the future. I want to do this right the first time.
I live in Buffalo, NY. I am planning on mortaring down the flagstone and then using polymeric sand for my joints (1/2" wide). The flagstone is all sqaure cut, not irregular. Should I mortar the joints? If so, is the mix the same as the mortar for laying them down?