Board Over old tile adhesive

Discussion in 'Tilers' Talk' started by DIYBS4, Feb 15, 2021.

  1. DIYBS4

    DIYBS4 New Member

    Hi everyone. I have removed our old bathroom tiled floor down to the plywood sub floor. I am left with lots of patchy adhesive on the ply. I am going to lay new laminate. I need to make up a level difference of 10mm so was going to re board over with ply. Removing the old adhesive is slow going so was wondering how level I need to make the existing sub floor. Can I leave old patches if adhesive on there and just lay new ply over? Thank you.
  2. CGN

    CGN Screwfix Select

    How many square feet/metres are you dealing with? Are you using the correct tools to remove it with?
    DIYBS4 likes this.
  3. DIYBS4

    DIYBS4 New Member

    About 4 sq m, I am using a hammer with a variety of bolster, chisel, wood chisel. Any suggestions? Thanks
  4. DIYDave.

    DIYDave. Screwfix Select

    If you’ve got 6mm flooring ply laid over floorboards, would be easiest to rip up ply, clean up floorboards and start with fresh ply

    If you’ve got 18mm ply, maybe a different approach - floor scraper (Big Mutt) or scraper blade in multi tool (but slow going)

    Again, if you’ve got 6mm ply, this is more than likey gonna damage surface layers of ply getting off the adhesive

    Laying ply over lumps of old tile adhesive is going to leave voids between the layers and be difficult to get the ply level

    Best option maybe is to just remove the high spits of tile adhesive, prime with SBR, then pour a ‘flexible self levelling compound’ over the lot to correct finish level

    No need for ply or removing adhesive, correct level and perfect surface for your vinyl - seems the way to go
    DIYBS4 likes this.
  5. Jiml86

    Jiml86 Screwfix Select

    As Dave said If take up the ply and whack down new stuff

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