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Problems with karndean

Discussion in 'Vinyl / Impervious floor coverings' started by Carys, Mar 24, 2015.

  1. pf flooring

    pf flooring Well-Known Member

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    Hygrometer rh% readings are to british standards and hold up in court so are accurate, could there be a leak in the ufh? as although the scan mode isn't good enough to know exactly how wet the substrate is,but at circa 93rh% the meter would be screaming at you as you scanned it!
     
    pf flooring, Apr 16, 2015
    #61
  2. Distinctive Adam

    Distinctive Adam Well-Known Member

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    How old is the concrete, not the screed I mean base?
     
    Distinctive Adam, Apr 16, 2015
    #62
  3. Carys

    Carys Member

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    All new. Old floor digged out and new damp course installed eith new concrete floor, insulation amd underfloor heating.
     
    Carys, Apr 16, 2015
    #63
  4. Carys

    Carys Member

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    Plumber says pressure in water tank would go down if there was leak in ufh. There isn't.
     
    Carys, Apr 16, 2015
    #64
  5. Rugmunching

    Rugmunching Well-Known Member

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    Id have moved out by now!!!!!!
     
    Rugmunching, Apr 16, 2015
    #65
  6. Distinctive Adam

    Distinctive Adam Well-Known Member

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    How new was the floor before an installer prepped and fitted on it? I have a feeling incorrect testing was carried out, floor was in fact still wet, hence now floor has failed. Again not a product failure. Installation error IMO
     
    Distinctive Adam, Apr 16, 2015
    #66
  7. Bow Flooring

    Bow Flooring Well-Known Member

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    Nearly every concrete floor will look dry as it evaporates into the air it's when it's trapped and builds up underneath the floor covering same reason the box must be fitted for an amount of times to see how much moisture is coming from the subfloor into the box
    When you turn the underfloor heating on it speeds this up and pushes more moisture out
    Should have been forced dryed using ufh and dehumidifiers
     
    Bow Flooring, Apr 16, 2015
    #67
  8. floorcraft

    floorcraft Well-Known Member

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    I'm with you on that Adam. Either concrete not dry or the top screed. Gypsum based screeds are hard to test, I'd say not dry when first installed, the floor cannot dry with the karndean on top.
     
    floorcraft, Apr 16, 2015
    #68
  9. Bow Flooring

    Bow Flooring Well-Known Member

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    And grinded and the right smoothing compound+primer
     
    Bow Flooring, Apr 16, 2015
    #69
  10. Spacey

    Spacey Super Moderator Staff Member

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    Just reading this thread again & I thinks it's going a bit off course. .

    It's probably still wet yes

    But from the vibe I'm picking up the fitter is banging on about the moisture coz he's now realised
    he's cocked up big time & looking for a get out of jail card ?

    So it's probably wet
    Definitely not had the laitance ground off
    Hasn't been prepped properly
    Resulting in a failure

    Parts of the sub are cracked but it still would have failed

    Fitter does not not pass go Does not collect $200

    This all down to either not knowing or not carring probably the latter.

    Anhydrite is catching fitters out left right & centre all over the country hense all if us on hear
    ****ting are pants at the mere mention of the word.

    Floorlayers worst nightmare But builders love the stuff. .
    tIt's bi-product so it's cheap
    Ready mixed so quick
    Goes down flat as a fart
    and is an excellent heat conductor for UFH
     
    Last edited: Apr 16, 2015
    Spacey, Apr 16, 2015
    #70
  11. pf flooring

    pf flooring Well-Known Member

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    Its gonna be used loads on new builds soon too as its a recycled product that looks good on their green quotas, I've seen it starting to creep in more and more.
     
    pf flooring, Apr 16, 2015
    #71
  12. Spacey

    Spacey Super Moderator Staff Member

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    Definitely mate apart from laying a floor on it it's perfect
     
    Spacey, Apr 16, 2015
    #72
  13. RPB

    RPB Super Moderator Staff Member

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    What levelling compound is recommended for use on this type of floor?
     
    RPB, Apr 16, 2015
    #73
  14. Spacey

    Spacey Super Moderator Staff Member

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    Gypsum based ideally like stopgap 1100
     
    Spacey, Apr 16, 2015
    #74
  15. pf flooring

    pf flooring Well-Known Member

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    Uzin nc110 :cool:
     
    pf flooring, Apr 16, 2015
    #75
  16. DM Flooring

    DM Flooring Well-Known Member

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    Used 1100 yesterday flow was awful. Used Uzin 110 before and flowed out like milk. Superior product in my opinion.
     
    DM Flooring, Apr 17, 2015
    #76
  17. pf flooring

    pf flooring Well-Known Member

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    Chalk and cheese eh dave
     
    pf flooring, Apr 17, 2015
    #77
  18. Carys

    Carys Member

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    Can anyone recomnend someone who might insoect the floor for us and give a professional opinion as to the cause of failure? We live in North West Wales.
     
    Carys, Apr 30, 2015
    #78
  19. RPB

    RPB Super Moderator Staff Member

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    If it was fitted by a Karndean registered installer, it will carry a waranty and you'll have a certificate of warranty., so could try calling the tech department.
    If bob the builder installed it.., I'm afraid the warranty will be invalid.
    Either way, hope you get it sorted at minimal cost.
     
    RPB, Apr 30, 2015
    #79
  20. Carys

    Carys Member

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    We want to get to the bottom of the cause as there are several things which could be responsible, posdibly not all to do with the installation of the karndean e.g cracks in subfloor. We need an independant view by someone who is qualified in this type of work who can hopefully come to a conclusion as to where the blame lies.
     
    Carys, Apr 30, 2015
    #80
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