Speedymason Stone Lath is a thin stone installation system that provides a barrier like metal lath and a full bed of mortar behind the stone. With Speedymason Stone Lath, thin stone can be installed up to 2-3 times faster than traditional wire or panel systems. Stone Lath With Rainscreen comes in 16″ x 48″ composite panels with 10mm rainscreen already attached on the back. Stone Lath With Rainscreen allows drainage and ventilation to exterior walls, and works great in areas with high rainfall or wind-driven rain.Â