Floor levelling

Discussion in 'Subfloor Preparation' started by Sam90, Feb 20, 2021.

  1. Sam90

    Sam90 New Member

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    Hi. I am wanting to level a concrete hallway floor. However, I discovered old black tiles when I removed the old laminate flooring, some of which are broken. I was wondering whether I need to uplift these before levelling or whether the compound could just be applied on top after clearing away the broken pieces?
     
  2. Rugmunching

    Rugmunching Well-Known Member

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    Take them all up, you'll find that they come up pretty easy anyway.
     
  3. Spacey

    Spacey Super Moderator Staff Member

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    Be aware they may contain asbestos
     
  4. Simon Grimley

    Simon Grimley Well-Known Member

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    Not worth the risk. Get them tested, it doesn’t cost a lot and can save you major headaches later.

    Friend of mine runs an asbestos testing and removal company if you want advice I’ll put you in touch.
     
  5. merit

    merit Well-Known Member

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    What’s going over the top? If they are stuck well you can latex over them. If your bonding anything down they need to be tested and removed.


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  6. Sam90

    Sam90 New Member

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    Thanks all. I was thinking they may contain asbestos so probably worth getting them tested unless anyone has any suggestions of a latex product that could just be put on top? The tiles are all mainly in good condition and stuck down apart from one or two in the corner which have broken in half. I’m wanting to lay LVT flooring on top, not tiling if that makes a difference.
     
  7. merit

    merit Well-Known Member

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    Need to come up then. You will need a moisture test and some sort of surface dpm.


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  8. Sam90

    Sam90 New Member

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    The LVT I’m going to lay is the click type so doesn’t need glueing down etc.

    I’ve been reading through other forums and a recurring suggestion is to remove loose pieces, brush and mop before applying two coats of SBR and then SLC. Interested to hear people’s thoughts about this.

    My house is on top of a hill so assuming less chance of rising damp - will the old layer of bitumen be sufficient?
     
  9. merit

    merit Well-Known Member

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    Clic doesn’t last long if there’s any moisture under it. You could latex over the tiles, put down a isolator sheet then clic over it.
    Personally I would get them tested first, if no asbestos remove them. If they have asbestos I would put a good coat of latex over them. They need to be stuck well tho.


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