Dry laid paths are flagstone paths/ paved areas, which like dry stone walls, are built without using mortar. The paths or paved areas such as a patio or seating area are built with stone bedded onto a layer of 'quarry dust' or crushed stone on top of an initial sub base. Because they are built without using slabs and mortar it means they drain water well. Unlike mortared paving they are flexible structures allowing for very slight movements in low/ high temperatures without causing damage. Tight joints between stones are filled with 'quarry dust' creating a strong bond and locking the stone in place.