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Greenboard or Cement Backer for Tub/Shower?

15 years ago

Need to replace a tiled wall behind a 5' tub with a shower.

It was built circa 1970, and the installer used conventional sheetrock with 4X4 ceramic tiles. It's rotted out because of small cracks in the grout at the base of the wall.

Should I use moisture resistant sheetrock or the cement backer board behind the new tiles? The moisture resistant sheetrock would be a lot easier for me to put in.

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