Corian tub/shower surround installed over Redgard

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by bluebinky, Feb 3, 2017.

  1. bluebinky

    bluebinky Member

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    Aug 31, 2011
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    Electrical/Embedded Software Engineer, Retired
    Location:
    Des Moines, WA
    The wife comes home just after I finish waterproofing the Hardieboard tub surround and decides that a solid surface surround is the way to go after all. It doesn't seem that silicone will adhere properly to the Redgard.

    Should I go over the Redgard with skim coat of (modified) thinset, or any other ideas?

    Thanks in advance.
     
  2. CountryBumkin

    CountryBumkin Active Member

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    Orlando, FL
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  4. MKS

    MKS Member

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    Would covering the redgard with 1/4 inch backer board be a deal breaker?
     
  5. dj2

    dj2 In the Trades

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    Aug 13, 2013
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    You can you use modified thin set (powder type, not the premixed) over redgard.
     
  6. bluebinky

    bluebinky Member

    Joined:
    Aug 31, 2011
    Occupation:
    Electrical/Embedded Software Engineer, Retired
    Location:
    Des Moines, WA
    Thanks. That is what I was originally planning to do for putting up tile.

    Any idea how well dabs of silicone will adhere to a skim coat of thin set? Which would stick better overall, modified or unmodified?

    As for putting up more backerboard, it would seem much better to not penetrate the water barrier. It would still probably be better than using greenboard, as the manufacturer suggests.

    I'll search on the johnbridge forum.
     
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