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I want to install Kohler Choreograph sheets in my shower over tub. It currently has a full fiberglass unit. Should I use osb, greenboard, or possibly cement board, and do these have to be water-proofed?

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According to this video produced by Kohler, you should use greenboard or other water resistent backer material. I wouldn't use OSB, and cement board seems like overkill but could help if you needed to stiffen up the walls I guess.

https://youtu.be/4-s-pfbj0YU

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Kohler recommends water resistant drywall or green board. Make sure you have blocking at the height needed if installing things like hand rails.

  • Do you have a source? I'm having trouble finding installation docs. – isherwood Feb 20 at 19:42
  • Found a video from kohler by searching kohler Choreograph. They stated the requirement and the need for backers, I haven't used this product so I had to look it up. I just noticed jphil 1618 posted the link I was watching we must have been there about the same time. – Ed Beal Feb 20 at 19:47
  • Would purple board be preferred over green board? – kponz Feb 20 at 20:43
  • Purple is a little better because it is water resistant + mold and mildew resistant. Green is not mold and mildew resistant so yes purple would be better in a shower stall area. – Ed Beal Feb 20 at 20:47

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