As well, the entire board surface needs to receive a liquid waterproof sealer before installing the tile finish. Alternatively, you can install a waterproof material and membrane (e.g RedGard and Crack Prevention Membrane) over the framing prior to attaching the WonderBoard to deter moisture from...
Waterproof Wood-Look Floors Wood flooring is a no-no in bathrooms, since moisture and humidity can cause the boards to warp and crack. Rigid core flooring is a wood-alternative material that resembles the real thing but without any of the performance issues, thanks to its multilayer constructi...
Flexible Waterproof Rubber Coatings ElastoLock® is an easy-to-use, single component coating that locks firmly onto concrete and concrete block — as well as tile backer board, drywall, fiberglass decking, primed metal and plastic. Learn More... ...
Alaska man's suggestion is a good one. However, it's not necessary to use anything other than drywall above your tile in my opinion. It's Also, it's common to leave the drywall slightly below the top edge of the tile so that the joint between the backer board and drywall gets covere...