|Posted by John Bridge on October 31, 19100 at 08:31:57:|
|In response to Re: installing tile on aquaboard (green drywall)|
Do not, repeat do not use green sheetrock or any other type of sheetrock as a substrate for ceramic tile in a wet area such as a shower. Be aware that tiles and grout do not form a waterproof barrier. In fact, standard wall tiles act as sponges and draw moisture in. A good portion of our business is comprised of tearing out "sheetrock showers" and relpacing them with better installations.
I recommend Hardi-backer in the 1/2 in. thickness, installed over green sheetrock. Use radius trims (mud cap, bullnose) at the edges of the backer board.
If the sheetrock wall is already in place, install plastic sheeting and then the Hardi-backer.