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Thread: Backer Board Under Sheet Products?

  1. #1
    DIY Member elgato's Avatar
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    Jan 2007
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    Default Backer Board Under Sheet Products?

    I have stripped the bathroom down to the studs. I plan to install a Swanstone shower base with Swanstone or other sheet type surround.

    Is there any reason to use backer board products with this type of surround or is green sheet rock adequate?

    Expense and labor aside, what is best for this application?

    Thank You
    Tom

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Default

    Personally, I'd put in cement board. If it leaks at the seams, the greenboard is only marginally better than plain drywall. Both contain gypsum, which mold loves, whereas cbu doesn't support mold on its own, it takes something else contaminating it to support mold.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY Member elgato's Avatar
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    Thanks.

    A lot of people recommend structolite for the mud base under the shower pan.
    Is the gypsum content a concern?

    Tom

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    If it never gets wet, it isn't a problem...
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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