A masonry contractor installs concrete units and baked clay products; concrete, glass and clay block; natural and manufactured stone; terra cotta; and fire brick or other material for refractory work. This classification includes the fabrication and installation of masonry component units for structural load bearing and non-load bearing walls for structures and fences installed with or without mortar; ceramic veneer (not tile) and thin brick that resembles full brick for facing; paving; and clear waterproofing, cleaning and caulking incidental to masonry construction.