Ceramic bathroom tiles are a great addition to any shower or tub. The durable material stays resistant to moisture for many years if maintained. When you begin to see cracks or damages to the tile, it is time to take action. Repairing ceramic tile walls is not something to procrastinate about as it may result in a total wall replacement if moisture reaches the drywall. Below are four simple steps to follow when repairing ceramic bathroom tiles. Number one – remove the old grout; you should use a grout saw to scratch out the faulty grout and use a straight blade scraper to cut out the caulk bed. Number two – re-grout the area between tiles. You can use a premixed grout or a powdered grout, both are inexpensive. Let the grout sit overnight before taking any other steps. Number three – re-caulk the seams of the ceramic wall starting with the joint that connects the tub or shower to the tile.  Lastly, wait until everything has dried and apply a silicon sealer to all of the joints to help lengthen the longevity of your work and make the grout more water resistant. More here