We took down the tile and found that the drywall had mold. I was told this
was the original tile from 1972. Took out the old drywall and tile and put
new greenboard up and tiled her up again. My guess is this should last over
20yrs or so. So why would I spend $2000.00 - $3000.00 on cement board and
Ditra system when this will last well over 10yrs and would be easy to
replace. Using Greenboard and tiling cost me $350.00 installed.