new Uncoupling Mat

Discussion in 'Shower & Bathtub Forum & Blog' started by johnfrwhipple, Apr 9, 2013.

  1. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    No idea what kind of strength you'd have with a pull test. The vast majority of stress on tile is in shear, either from bending or if on a vertical surface, just from the weight. As noted, at least as I remember it, the 50psi industry rating is for shear, not pull. I'm not sure I've seen a pull test requirement.
  2. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Sorry folks. I removed much of this discussion since it refrenced Ditra and I have quit using and talking about Schluter's products.


    JW - "When it's perfect. It's Good Enough."

    www.No-Curb.com - my blog site on Barrier Free, No Curb, No Dam and Hobless Showers
    (604) 506-6792 jfrwhipple@gmail.com
    Last edited: Dec 13, 2014
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    On a wall would be more in line with my understanding of the test procedure.
  4. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    I think the grout simulates a full wall install better, since it ties the stuff together. Makes it harder for the membrane to shear off, since it's sharing the load across a larger area. But, I have not read the details of the actual test procedure, so may be misinterpreting it.
  6. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    SpiderWeb 2 vs Ditra & Noble Seal TS (Head to Head Challenge)

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  7. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Installing Ditra with Ardex AF207

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  8. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Thin-set used in testing

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  9. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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  10. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Spider Web 2 Testing

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  11. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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  12. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    The industry tests are after 28-days, the standard for cement based products. After the first week, it has most of the strength. But, also consider that cement continues to gain strength for years, the 28-days was a calculated compromise based on typical construction timelines representing 'typical' strength.
  13. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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  14. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Testing day is here at last

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  15. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Pictures of the shear testing control test

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  16. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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  17. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Uncoupling membrane - shear testing (Ditra with Laticrete 254 Platinum)

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  18. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    What's the bonded surface area of the brick? As has been said, a membrane should hold at least 50#/sqin. From a practical viewpoint, I think you've proven you're not likely to strip a tile off the wall easily once the mortar has cured some, at least for Ditra, you've tested.
  19. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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  20. johnfrwhipple

    johnfrwhipple Bathroom Design & Build - North Vancouver, B.C.

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    Ditra Shear Testing - Failure point 1470 pounds

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