LVT failiure

Discussion in 'FAQ Section For Consumers' started by Jenna, Jan 28, 2024.

  1. Jenna

    Jenna Member

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    We are looking for some advice regarding a floor installation that we had carried out at our property back at the end of June that subsequently started failing at the start of September. We are unsatisfied with the explanations given and are currently at an impasse with the supplier and fitters.

    To give some background, we have had an extension to our property and as part of an LVT floor install the kitchen / dining area was levelled using Ultrafloor Renovate IT after priming using Ultrafloor MSP primer. The new screed was laid on top of existing screed laid 7-8 years ago over quarry tiles.

    LVT herringbone flooring was then glued to the new screed. Prior to levelling; no moisture testing was performed and from observations made believe only one primer coat was put down - this doesn't comply with what I believe is industry best practice or with the guidelines on the manufacturer's datasheet for the primer used.

    We are now seeing debonding of the new latex screed from the original subfloor with the LVT floor being pushed up as a result.

    The installer arranged for a representative from the manufacturer of the screed / primer to visit. That person took some photos and said they would have to consult with their technical team. After a few weeks of chasing we had a very limited report in which they say the issues have been caused by ‘a weak subfloor that is unable to take the strength of the smoothing underlayment’ and the failures seen are as a result of this.

    We have been provided no evidence or suitable technical explanation of how this is the case.

    We have had no issues with the previous laminate floor, and no issues were evident when this floor was removed during the building work, no marking, damage or loose subfloor.

    What we don’t know is, if this explanation is reasonable. The installation company has accepted the Instarmac explanation and will do nothing further.

    We are at a complete loss as to what to do.

    Any advice appreciated.
     
  2. merit

    merit Well-Known Member

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    Is the quarry tile floor area old?
    Has there been a moisture test since the floor has lifted?
    Was the old screed exposed during the building works?
     
  3. dazlight

    dazlight Super Moderator

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    Can you post some pictures
     
  4. Jenna

    Jenna Member

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    Some photos.

    Quarry tiles were covered with what we presume was self levelling compound over 8 years ago. They tiles must be incredibly old. We had laminate flooring and when this was removed during build there were no apparent cracks etc to subfloor.

    When we had our extension built there was a new screed to the new extension. Flooring fitter then put self levelling compound across whole old and new kitchen before lvt (invictus) installed. (As above)

    Where it's blown is in the old part of the kitchen (about 3 m2) we could hear the floor sound hollow in that part before it lifted. It doesn't sound hollow anywhere else.

    We are just completely at a loss as to how to sort.
     

    Attached Files:

  5. dazlight

    dazlight Super Moderator

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    The quarry tiles won’t have a damp proof membrane under them. So the LVT fitter should have put down an epoxy liquid Dpm over them. Like ardex DPM1c
     
  6. Jenna

    Jenna Member

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    Looks worse now as has lifted more. Instarmac sent a sales rep who took photos. No moisture testing. We then had a report from technical specialist who said in his opinion their product was fine and a weak subfloor caused the issue.

    We are at the point where our floor is covered by a rug as it's a huge trip hazard and we are massively out of pocket.

    We just need a floor!
     
  7. dazlight

    dazlight Super Moderator

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    Where do you live Jenna
     
  8. Rugmunching

    Rugmunching Well-Known Member

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    So the quarrys were already covered with a screed 8yrs ago and the fitter went over the whole lot with a new screed?
     
  9. merit

    merit Well-Known Member

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    They may have used a moisture tolerant levelling compound 8 years ago. Plus the laminate is floated so the floor may breath a bit more. ultra floor renovateit is not moisture tolerant so any moisture beneath would make it lift.
    also they make a point of stating the subfloor needs to be strong so im guessing it can shear easily. If the floor was covered in plaster, paint and general builders mess the bond will be weak. Im not a fan of instarmac levelling compounds.
     
  10. merit

    merit Well-Known Member

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    Even the quarry tiles can lift. Ive literally just done a repair at our village hall. Previous contractor went over old tiles with a water based leveller and sheet vinyl. Bit of moisture got in from the back door and its blown the tiles and levelling compound. Water based levellers dont like moisture, especially when its trapped under a impervious floorcovering
     
  11. Paul webb

    Paul webb Well-Known Member

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    Has just the new screed lifted, or has the existing screed lifted off the quarry tiles?
     
  12. Distinctive Adam

    Distinctive Adam Well-Known Member

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    Poor preparation produces poor performance
     
  13. Jenna

    Jenna Member

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    Just the new
     
  14. Jenna

    Jenna Member

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    Yes new slc
     
  15. Jenna

    Jenna Member

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    Cardiff
     
  16. Jenna

    Jenna Member

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    What do you advise we do now?

    I am guessing the entire thing needs to be lifted?
     
  17. Rugmunching

    Rugmunching Well-Known Member

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    ....and where is it actually popping off?
    The existing screed? Or has it came off the quarrys?
     
  18. Jenna

    Jenna Member

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    Existing screed, quarry still well hidden!
     
  19. Jenna

    Jenna Member

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    Existing screed
     
  20. Jenna

    Jenna Member

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    Hopefully you can see here..
     

    Attached Files:

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