Kerdi Membrane VS Mapei Aqua Defense

Discussion in 'Shower & bathtub Forum & Blog' started by Footman_75, Jan 30, 2013.

  1. Footman_75

    Footman_75 Renovating

    Messages:
    36
    Location:
    Ontario, Canada
    Hi all,

    I am in the process of installing waterproofing system for a shower wall.

    I know this is a plumbing forum, and my question is more for tiling professionals, but I appreciate the level of expertise here, and hope there are a few people out there with some experience on the following products:

    1) Kerdi Membrane
    2) Mapei Aqua Defense

    Item 1) makes sense to me, but I'm told it requires unmodified mortar, which doesn't make much sense. Using a mortar which offers no plasticity seems like a great way to have your shower membrane sheer off from your backerboard.
    Item 2) offers serious plasticity, and my tile suppliers use it on their jobs and recommended that I use it. I'm leaning in this direction, but the idea of just painting on a waterproofing system, well, I'd like to hear from more people who have used the product, for better or for worse.

    Thanks in advance,
    Foot
  2. BillTheEngineer

    BillTheEngineer Member

    Messages:
    34
    Location:
    Hauppauge, NY
  3. Footman_75

    Footman_75 Renovating

    Messages:
    36
    Location:
    Ontario, Canada
    Thank you!
  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,917
    Location:
    New England
    The fleece on the Kerdi membrane gives it a microscopic amount of flexibility in shear. Under any normal circumstances, you'd likely crack the tile or wall before you sheared off the membrane when properly installed.
  5. johnfrwhipple

    johnfrwhipple I love these ACO Shower Drains - Best in Class

    Messages:
    3,986
    Location:
    North Vancouver, BC
    Post(s) deleted by John Whipple
    Last edited: Mar 15, 2014
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