Bathroom floor -- please advise

Discussion in 'Tilers' Talk' started by kaps, Aug 13, 2019.

  1. kaps

    kaps New Member

    Hi, We have a got a flat on 3rd floor in a purpose built. We just noticed our bathroom floor board got damaged with water and it's almost to be replaced.
    This time we are looking to get tiles but please advise if we replace chipboard with hardieback cement floor boards and then tile over.
    Or do we need ply first and then hardieback cement floor and then tiling. We will be ripping whole bathroom so have the option to replace the floor altogether. Please advise.

  2. DIY0001

    DIY0001 Active Member

    Lay ply, or replacement chipboard, first - at least 18mm. Being cement board, Hardiebacker board is strong in compression, but weak in tension so it will crack if you put any bending load on it, such as your weight unsupported between joists.
  3. Hans_25

    Hans_25 Well-Known Member

    As above, I'd lay 18mm ply ideally then 6mm Hardiebacker on that, then tiles.
  4. kaps

    kaps New Member

    Thank you. Is it better to go for 18mm chipboard or shall we opt for ply.

  5. Dam0n

    Dam0n Active Member

    Ply every time if you can afford it
  6. Mike58

    Mike58 Active Member

  7. CGN

    CGN Well-Known Member

    18mm Ply and 6mm backer board. Hardie floor another alternative.

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