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Discuss Backing board for half tiled wall in the DIY Tiling Forum area at TilersForums.co.uk.

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  1. AlexJones

    AlexJones Active Member

    Location:
    Bristol
    Hi All

    I have a question about backer board vs moisture resistant plasterboard for a non-wet zone wall in my bathroom. The back wall of my bathroom has a window, with a wall hung toilet. I was going to tile half the wall, then have it plastered for the top half so the window returns will be plastered as well etc. (so far it’s just stud work, with the window but toilet has not yet been installed).


    Can I lay plasterboard for the whole wall get it skimmed then tile onto it, or would it be better to put down some sort of backer board (say marmox multi board or similar), and then tile straight onto the backer board, then get the top half skimmed?

    I assume if I were to lay backer board and got the top section skimmed (few mm), plaster would apply and adhere just as well to the backer board as plasterboard?
     
  2. macten

    macten Professional Tiler

    Location:
    Nottingham
    What size and type tile you using?
     
  3. AlexJones

    AlexJones Active Member

    Location:
    Bristol
    I’m using porcelain - 370mm by 750mm
     
  4. macten

    macten Professional Tiler

    Location:
    Nottingham
    Too heavy for skim so you will need to tile then get the top skimmed or once it's boarded out do your set out for the horizontal and put a line on where the top row will finish and get the plasterer in first - they tend to make a mess!

    I only use pb on walls (tanked in wet areas) unless it's a wetroom build
     
  5. AlexJones

    AlexJones Active Member

    Location:
    Bristol
    ok thanks for the response, I assume when it comes to tiling backer boards would be recommended over plasterboard due to the weight of the tiles (British gypsum says you can tile straight to the boards - but wondered if that’s advisable considering it’s just a paper face).
     
  6. macten

    macten Professional Tiler

    Location:
    Nottingham
    unskimmed pb can take 32 kg/m2- so absolutely fine for your porcs.
    Backerboards can take more weight but you're not fitting thick heavy stone.
     
  7. AlexJones

    AlexJones Active Member

    Location:
    Bristol
    Ok good to know thanks again for the help on this.

    Alex
     
  8. whitebeam

    whitebeam Moderator Staff Member Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Hertfordshire
    Get the plasterer to feather out the finish just below the tile line.
     
  9. AlexJones

    AlexJones Active Member

    Location:
    Bristol
    What about tiling and the plasterer finishing to the trim line? Although I suppose the trim could get a bit messy in terms of the exposed clean edge.
     
  10. AlexJones

    AlexJones Active Member

    Location:
    Bristol
    Following of from that is trim commonly added post plastering, or is it sometimes added pre plastering - for example in my situation where you have a 50/50 split of tiles and plaster. Can you get a clean trim line if the plasterer feathered into it, and if you covered it in say some sort of tape?
     
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