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Plywood over floorboards before Karndean/Amtico

Discussion in 'Floors, Stairs and Lofts' started by Gooner239, 13 Feb 2019.

  1. Gooner239

    Gooner239

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    Location:
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    Hello All,

    I am in the process of renovating the bathroom and there is currently a 12mm OSB board laid over the original floor boards. We intend to have a Karndean/Amtico floor laid so I will be removing said OSB and replacing with 12mm plywood, which I take is common to both floor types.

    Questions please:

    1. What centres to fix the plywood?
    2. What direction relative to the floorboards to lay the plywood?
    3. What screws (gauge, length) to use for fixing?

    Thanks all
     
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  3. dazlight

    dazlight

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    Location:
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    With 12mm plywood every 6” on centres and 4” on edges.
    Lay plywood opposite way to floorboards
    Screws use 25mm if you are going over 18mm floorboards.
     
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