Solid boards to be installed in parallel rows now produced in these thicknesses 1/2″, 3/4″, 33/32″ and these widths 1 1/2″, 2″, 2 1/4″, and occasionally 3 1/4″. The strips are tongue and grooved and end matched. They are for nail down installation directly to wood or plywood subfloors; or over wood screeds on concrete slab construction.