When it comes to moisture management, only one tile backer is engineered to keep moisture out of the wall cavity - DensShield® Tile Backer from Georgia-Pacific.
Forget greenboard and heavy, hard-to-install cement backer board. DensShield backer board is a better option. It features fiberglass mat facings and a unique heat-cured acrylic coating, so it is lightweight, goes up faster and is easier to handle than other tile substrates. What is more, it is engineered to provide exceptional strength and outstanding moisture management as well as superior microbial resistance (based on ASTM Standard D 6329).