This industry comprises establishments primarily engaged in setting and installing ceramic tile, stone (interior only), and mosaic and/or mixing marble particles and cement to make terrazzo at the job site. The work performed may include new work, additions, alterations, maintenance, and repairs. Exterior marble, granite, and slate work--are classified in Industry 238140, Masonry Contractors; Manufacturing precast terrazzo products--are classified in Industry 327390, Other Concrete Product Manufacturing; and Installing, without selling resilient floor tile--are classified in Industry 238330, Flooring Contractors.