Posted: 4/26/2013 8:05:05 AM EDT
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Remodeling the bathroom and old tile was stuck to a 1/2" backerboard and that board was placed on top of the drywall.
In the process of removing it all. Should I continue on down to the studs and then put new drywall in and then backerboard on top of that? Or just the cement board to the studs and flush fit the tile on top? |
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Quoted:
You might want to consider a tar paper or sealant before you put up the cement board. I was advised not to do this. The rationale goes like this - the moisture barrier represents a surface on which there will be condensation of moisture that migrates thru the backerboard (moisture vapor not liquid water). If that moisture encounters a vapor barrier, it will condense to liquid water. At that point, you have a water problem. Leave the vapor barrier off. Let the moisture evaporate into the cavity. If you are going to use a moisture barrier, it has to be on the tile side of the backerboard. Use Red Gard or Kerdi on top of the backerboard underneath the mortar. I practice what I preach - I will be doing the above (Red Gard) when I redo my shower (probably next month). |