[header] How to install ceramic wall tile [title] Make sure your wall is ready to go. [step] Once you've removed the current wall dressings and wall items, like light switch covers, you'll want to check the base layer that you will be building on to make sure that it is structurally sound. This is important, since a rotting or weak wall can cause your tiling job to warp, crack, or even break and fall down. 
[substeps] Look for signs of mold or damage to the tiling surface. Cracks are often a sign that a wall may be weak and need to be replaced.