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chipboard floor. tile prep question

Discussion in 'Tiling' started by Cenci, 26 Apr 2015.

  1. Cenci

    Cenci

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    Previous builders made quite a few cuts into the chipboard floor. (See photo)

    I was planning to just have hardiebacker which I have already purchased. However there is slight creaking indicating a bit of movement. Would you recommend ply as well as the Hardie backer?

    I'm happy to do it as just want to ensure a solid surface but do you guys think its required or over the top?

     
  2. AdamCH

    AdamCH

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    What you need to do depends on why the Chipboard is creaking - are the joists underneath flexing? Or is it that the cuts aren't supported?

    Best approach would be to fix whatever's making it flex & then go over with the Hardie backer - or trash the Chipboard & replace with 18/22 mm Ply & hardie on top.
     
  3. JohnD

    JohnD

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    best preparation of chipboard is to pull it up and put on bonfire.
     
  4. Cenci

    Cenci

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    Thanks for the replies. Joists seem OK at 400 centres.
    I have added a few more screw's avoiding the pipes and it seems to improve it. I reckon I'll add a load of adhesive then lay down my hardieboard. Hopefully that will be sufficient
     
  5. tpt

    tpt

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    as long as the subfloor is secured hardie is very good stuff. you'll notice the difference as soon as you lay it
     
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    DIYnot Local

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