What is the best floor leveling compound for putting under sheet vinyl flooring?
You can eliminate the humps and dips by using a straightedge and floor leveling compounds. I prefer to use the cement based products that mix with water. Most of them will readily adhere to concrete floors or wood subfloors. If you intend to apply your tile on a cement board product that will be nailed to the wood subfloor, you should remove the humps and dips before you nail the cement board in place. Sources: http://www.askthebuilder.com/365_Install_Ceramic_Tile.
