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How level does a floor need to be?

Discussion in 'Floors, Stairs and Lofts' started by IJWS15, 25 Apr 2009.

  1. IJWS15

    IJWS15

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    Want to put engineered wood down in the dining room. 5m x 4.2m with a 1.6 x 1.4m rectangle missing from one corner.

    Fl;oor is solid, probably screed on concrete.

    Appears to be less than 3mm variation over a metre where I have been able to look (still some furniture in the room) but there is a crown of around 7-8mm in the centre of the floor.

    Don't want to raise all the rest by 7-8mm plus the floor thickness.

    Is this within the limits for an engineered floor or do I have to take some of the crown off.
     
  2. WoodYouLike

    WoodYouLike

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    Take some off - as much as possible so you only have a 3mm per meter sloop. You will regret it if you don't - no floorboard can take that much be it solid or engineered
     
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  4. IJWS15

    IJWS15

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    Looks like a noisy, dusty day with the SDS drill on hammer then.
     
  5. IJWS15

    IJWS15

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    Any recommendations for a floor levelling compound for a screed floor some of which has been painted?

    e.g. Is Bal Multibase as good as the data sheet implies?
     
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  7. Gteuk

    Gteuk

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    I tend to use screedmaster 2 latex based level, 3mm is quite a lot per 1m2 unless a good quality underlay is being used, go for a 6mm Poly Ethylene underlay which can absorb (sp) 1 to 1.5mm of undulation.

    Ensure you use a D3PVA glue also when laying the floor even if it is a click system.

    the uneveness of the floor is also dependent on the size of the board, i.e. a 2.2m board will act as a see-saw on a hump breaking your joints pretty fast.
     
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