Tiles are usually thin, square or rectangular coverings manufactured from hard-wearing material such as ceramic, stone, metal, baked clay, or even glass. They are generally fixed in place in an array to cover roofs, floors, walls, edges, or other objects such as tabletops. Ceramic tiles have a glazed protective layer on their surface that makes them impervious to water damage and stain penetration. This is why tile is so often used to floor bathrooms. They're also naturally resistant to humidity, making them ideal for flooring an area that is very hot or moist.