Excavate the site where you plan to lay flagstones to a depth of 8 inches, or below the frost line if your area gets freezing temperatures in winter. Building a deep foundation prevents frost-heave damage from dislodging the flagstones.
Excavate the site where you plan to lay flagstones to a depth of 8 inches, or below the frost line if your area gets freezing temperatures in winter. Building a deep foundation prevents frost-heave damage from dislodging the flagstones.
Place the first flagstone in a corner of the site, tapping it into the sand with a rubber mallet. The level of the first flagstone will determine the height of the entire surface. Step back and make sure the flagstone is not too high or low, and add or remove the sand as necessary.
Apply sealant over the flagstone surface to protect it from water damage and to prevent the sand joints from wearing away.