DensShield by Georgia-Pacific is the only one with a built in moisture barrier. Other products such as cement board will actually hold water like a sponge. Also, it cuts and hangs like sheetrock and is very light and easy to work with.
Here is a link to the GP site with detailed info on DensShield:
www.gp.com/build/product...
Michael Prachniak - Expert Tile and Stone Consultant and Writer, Owner - Tile Productions
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www.findanyfloor.com/tile/TileFloo...