Applies to specialist contractors who perform tile, stone, mosaic or marble work. Includes the installation of glazed porcelain or ceramic wall, ceiling or floor tiles, including work of a decorative, artistic or ornamental nature. Does not include the setting of rough tile work of the type used in structural partitions or that is ground supported or fireproof tile construction. Refer to code 5437 for countertops made from other materials and code 5478 for the installation of resilient flooring - carpet and laminate flooring.