2024-03-01
flagstones-Flagstone: what to use, sand, cement, or gravel?
Cement based mortar is a fine joint filling material if the flagstone happens to rest upon a concrete foundation. But why on earth would you want to have a concrete foundation anyway? The concrete itself will crack, eventually. In a northern climate it will likely crack within ten years—and the chances of it cracking within the next three years are pretty high too. Environmental impact of concrete production is no small issue either. Anyway, I personally prefer dry stone work. More harmonious, warmer, just better. The feeling you get from a well done dry laid flagstone patio, in my humble opinion, is just better than a flagstone patio set in cement.