SWMBO is laying out a sidewalk using some old flagstone from the original house. It'll be about 40 long and vary from 4' to 3' wide. She wants concrete under the stone so the grass won't be a problem later on.
Any ideas how best to approach this? We're thinking of pouring about 3" concrete and setting the stones on it while it's still wet, but the stones vary between 1 1/2" and 3" thick. Also, whats the best way to fill the gaps between the stones?
Thanks
Brian