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Thread: SpiderWeb II - Review of Custom Building Products new Uncoupling Mat

  1. #46
    Retired Defense Industry Engineer jadnashua's Avatar
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    Once the bond between the fleece and the membrane breaks, the only thing left is the plastic, and that, while tough, will tear. I agree, as long as you are consistent in how you run these experiments, the relative differences are accurate but may not match the industry standard test.
    Jim DeBruycker
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  2. #47
    ACO Shower Drain Sales johnfrwhipple's Avatar
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    Post(s) removed by John Whipple
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  3. #48
    DIY Senior Member chefwong's Avatar
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    KEWL Testing you got there.

    I've yet to read the thread in it's entirety.....but give me the cliff notes version on the shear strength testing.
    Seems mighty strong nevertheless .....for a application that is horizontal

  4. #49
    ACO Shower Drain Sales johnfrwhipple's Avatar
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    Post(s) removed by John Whipple
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  5. #50
    DIY Senior Member chefwong's Avatar
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    Heh. I mean what was the point of the shear test - bearing the stuff we are talking about is generally on a horizontal surface...

    Nevertheless, love the LAB WORK !

  6. #51
    ACO Shower Drain Sales johnfrwhipple's Avatar
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    Post(s) removed by John Whipple
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    jfrwhipple@gmail.com - www-no-curb.com - 604 506 6792

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  7. #52
    DIY Senior Member chefwong's Avatar
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    U make it sound like THE RACK is staying up until further notice.
    "SHE" must be quite understanding for the reason to the madness ;-)

  8. #53
    ACO Shower Drain Sales johnfrwhipple's Avatar
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  9. #54
    DIY Junior Member Phil Collins's Avatar
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    This testing was nicely done.
    If you look at uncoupling, one side has to be stronger than the other. Ditra's fleece side is weak and the dove tail side is strong. Spider web one has the fleece as weak side as well and the side with the netting is strong. Spiderweb II has both sides the same and you can call them strong or weak; the problem I see is the mat under tension will uncouple where ever and if it uncouples on top one will have cracked grout lines or even cracked tiles and that would be a failure. Ditra and Spiderweb one will always uncouple on the fleece side and never transfer the stress to the tile or grout line.
    By the way, the Spiderweb one is available on the Internet and called DURAL CI++, it was tested by the TCNA and got a "EXTRA HEAVY COMMERCIAL" rating on the ROBINSON FLOOR TEST. It was tested 19.2" oc over plywood.
    Great and by far the best product on the market today.
    Great forum

  10. #55
    DIY Junior Member Phil Collins's Avatar
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    Mistake, sorry
    The test was over OSB, everybody else tested over plywood. You all know that OSB is the weaker material and that makes the test look even better.

  11. #56
    Retired Defense Industry Engineer jadnashua's Avatar
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    Quote Originally Posted by Phil Collins View Post
    You all know that OSB is the weaker material and that makes the test look even better.
    Not all OSB is created equal. While this is a Huber document, the data comes from the 2012 edition of the AF&PA American Wood Council's, Allowable Stress Design (ASD)/LRFD Manual for Engineered Wood Construction. Advantech is both stronger and stiffer than plywood of equivalent thickness. http://www.huberwood.com/advantech/performance/strength

    Anyone know whose osb they used?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  12. #57
    ACO Shower Drain Sales johnfrwhipple's Avatar
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    Default Uncoupling Test - ANSI & TCNA approval for Spider Web and Ditra

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    jfrwhipple@gmail.com - www-no-curb.com - 604 506 6792

    Always get construction advice double checked by your local city hall. Flood Test Every Shower - Every Time.

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