I want to tile over parts of my basement floor but it is very rough. It is rough because the original floor was removed and the contractor poured the new floor out of level. So he chipped it back to level with an electric chipping hammer. I was thinking of using a cement board attached to the floor to provide a smooth surface to tile on to. I was wondering how to attach it to the existing concrete floor. I thought of using thinset then tapcon anchors. Or I could just skree a layer of something to smooth it out and not use the cement board. Any ideas or recommendations?