Originally Posted by crapbathroom
backerboard is NOT the best, cement is porus remember! you have to seal it before you put your tile on it, we are using a product called denseshield which is wonderful, it's very much like drywall and so it's easy to handle and cut, but it withstands water much better than cement backerboard.
Dense Shield is about the most unsafe CBU to use. 1/4 or 1/2 inch Hardie Backer or Durock is the way to go, water proof it for good measure.
Dense Shield, made like drywall, falls apart like drywall if it gets wet, and it will eventually get wet. Dense Shield is the "new" green board.
Sorry but cement boad is 100% the way to go and waterproofing is always a good idea no matter what. Dense Shield has a major rep for failures. When you nail or screw Densield you cant sink the head, you cant have tears of any size and the best part is having to skim coat over the nail heads with "cement". Any water behind the membrane will cause it to fall apart.... did they say use cement to cover the nail holes? Cement is pourous right?
I dont mean to be harsh but saying it will withstand water issues better then cement type backer boards is 100% not true. Its quite the opposite.