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How to level very uneven floor for tiling?

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  • 06-11-2006 6:42pm
    #1
    FrankGrimes
    Registered Users Posts: 4,031 ✭✭✭


    I need to level the floor in my kitchen in order to prepare it for tiling. It’s a concrete floor that originally had wooden floorboards nailed directly into it and under these was a layer of bitumen.

    The floor is seriously off-level and bumpy – I’d say it’s out an average of roughly 12mm, with some places up to 20-25mm, and some places down to 7mm. There’s no underfloor heating though there is a 2 inch deep trench that’s 8inches wide which has 2 x 0.5 inch qualpex pipes with lagging running along it to feed rads.

    The room is 3.5metre x 3.5 metre, has 3 walls (opens into a diner area at one end which will have solid wood flooring) and is completely bare as the walls have just been plastered and the kitchen will be ready for fitting once the floor is levelled. What’s the best way of getting it level enough to tile? Will the bitumen be a problem for binding, and if so, will scraping it overcome this?

    There’s plenty of jobs I’ve taken on no bother but the problems I had last time I tried something like this it didn’t go perfectly (was laying a wooden floor over it and though it was ok it was far from perfect), so I need to figure out how to do it right. I’d actually be prepared to pay a few bob to get this job done but reckon it’d be hard to find someone at short notice.

    Any tips on method, materials, or tools to use would be much appreciated.


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    #2
    Mellor
    Registered Users Posts: 39,410 ✭✭✭✭Mellor


    a leveling compound would be the easiest. Check out a few at the local diy supplies, see what kind of limits them work to. 12mm should be ok, but im not sure on that one.


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    #3
    tapest
    Registered Users Posts: 482 ✭✭tapest


    Hi F G
    "The floor is seriously off-level and bumpy "
    Bumpy is OK, off-level is the problem. Obviously self-leveling compound will "pool" at the deep end and at the shallow end you'll end up with a thin flaking layer, unless it is permitted to have it very thick at the deep end. My one and only experience with this stuff was disastrous.
    Question: how thin can you have a sand/cement or concrete screed if you use additives, ie Sika etc ..I've seen it pretty thin....Ask at builders provider yard. Might be a better direction to go
    t


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