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Is this acceptable?

Discussion in 'Tiling' started by ash1212002, 9 Feb 2020.

  1. ash1212002

    ash1212002

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    We are in the process of tiling our kitchen. The kitchen is half floor boards which have been overboarded with 6mm cement boards

    The tiles are 120x20 rectified plank tiles

    The other half is a concrete floor

    Total area 3.35m width by 6.87m length

    Electric underfloor heating is also being installed throughout.

    We've noticed the tiler in some areas of the floor primarily on the concrete side has used up to 30mm of tile adhesive!

    We questioned this and were advised it is due to the floor not being level hence why less adhesive has been used on the cement board section but more adhesive is required to bring it level on the concrete side

    Is this acceptable? If not what would be the correct method to address an uneven floor?

    Our concern is that given 30mm adhesive has been used will the underfloor heating still heat the floor?
     
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  3. TeaAndBiscuits

    TeaAndBiscuits

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    Must have cost a fortune in adhesive!
     
  4. ash1212002

    ash1212002

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    It certainly will, the job has not been completed yet.

    We've insisted on levelling compound to be used to increase the height of the floor
     
  5. foxhole

    foxhole

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    The floor levels should have been sorted before any tiler was brought in or any ufh installed.
     
  6. ash1212002

    ash1212002

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    We've got another tiler in who has started to level the floor.

    However we have some serious concerns with the appearance of the screend after 24 hours in some areas the floor has not dried and the fibres of the product have come up above the surface!

    I have contacted Mapei and sent them over the pics attached who have advised it appears to that too much water has been added to the mix!

    They cannot advise if this has compromised the integrity of the screed

    The product used was mapei renovation screed 3240 Does the screed look ok or does it need to be removed and started again?
     

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  8. johnny2007

    johnny2007

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    Self levelling looks ok to me.
    Fibres showing is normal.
    Never used mapei, i use bal which can go up to 80mm.
    However, for unknown reasons some patches dry quicker than others.
    I always leave 3 days before tiling, although I don't think it's necessary.
     
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  9. ash1212002

    ash1212002

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    That's reassuring, what worried me was in some areas it has dried and also the fibres are not evenly spread across the floor

    I sent the pictures to mapei who said it looks like too much water may have been used which worried me

    Once this has dried, is it worth priming the floor?before putting down the underfloor heating and then followed by another layer of self leveller? Thats what the tiler is planning on doing
     
  10. johnny2007

    johnny2007

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    Don't know anything about underfloor heating.
    I tempt to stick to the simplest solutions, so central heating on a combi for me.
     
  11. TeaAndBiscuits

    TeaAndBiscuits

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    Oh, now you've done it. Better hope nobody from the heating forum sees that :D
     
  12. DIYnot Local

    DIYnot Local

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