The highest point of my shower floor will end up approx. 2" below the bottom of the cement board. In between, this 2" is comprised of roughly-chipped concrete. Therefor, when I start with the bottom row, the tiles will attach to the wall only on their top half, creating a cavity along the bottom half of those tiles in row one. This is the problem that caused us to start this project. The builder neglected this, and many of the tiles were cracked and leaking into the walls. They also didn't use a liner! What can I do to ensure proper tile contact? I will try to attach a picture.

Hello, we currently have hideous barkerboard (also called Ceramalite?)tiles surrounding our bathtub acting as shower tiles. We are eventually going to put real tile in but for the time being i am wondering if it would work to prime and paint the barker board to just make it less of an eye sore until we can afford to tile. is this possible? and what type of products would work? any suggestions would be appreciated, thanks! chantelle