The California State Contractor's board issues very few C54 – Ceramic and Mosaic Tile Contractor Licenses. Why? Because anyone can go to the local Home Depot, ask 20 questions and throw down some tiles. In fact in Orange County you can ask around and find a few guys that will even do an entire bathroom for a nice meal. But the state of California, strictly mandates to whom they will designate as professional cermaic and mosaic tile contractors, complete with a license, insurance and years of experience.
From the state of California's website: A ceramic and mosaic tile contractor prepares surfaces as necessary and installs glazed wall, ceramic, mosaic, quarry, paver, faience, glass mosaic and stone tiles; thin tile that resembles full brick, natural or simulated stone slabs for bathtubs, showers and horizontal surfaces inside of buildings, or any tile units set in the traditional or innovative tile methods, excluding hollow or structural partition tile.
