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Waterproof wall & floor before tiling

Discussion in 'Tiling' started by sjoe, 26 Aug 2008.

  1. sjoe

    sjoe

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    Hi

    I am going to have my bathroom tiled (currently vinyl floor). I found out that my floor is a floating floor - 18mm chipboard & 100mm polysterene on concrete . I read that I should remove the chipboard & polysterene, replacing it with 4x2 joist, fill 2' polysterene in between & use exterior ply or marine ply on top before tiling. Is this the correct way?

    My bathroom currently have a bathtub which I'm replacing it with a shower tray & making room for storage cupboard/space.

    I would like to waterproof the wall but I'm unsure what to do. Should I use Aqua Panel & tank it? or Marine ply + tank it? or Plasterboard + tank it should do before tiling on it? What is the best tanking product?

    Joe
     
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  3. jefoss

    jefoss

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    for walls i personally would plasterboard and tank
     
  4. gcol

    gcol

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    I second that. ;)
     
  5. jefoss

    jefoss

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    ooo thats my opinion too :cool:
     
  6. sjoe

    sjoe

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    Thanks jefoss & gcol.

    What about floor? Marine ply & tank it?
     
  7. gcol

    gcol

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    Unless you're planning on making a wet room, there's no need to tank the floor. 25mm WBP (exterior grade) ply is sufficient. Check out the tiling sticky for further details.
     
  8. sjoe

    sjoe

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    Thanks gcol

    I did but after reading all other posts, got more confused.

    Is Bal WP1 waterproof shower kit for tanking enough? I'm replacing the bathtub with 1200 x 760 shower enclosure & have 120cm in length for WC & basin on a granite vanity top. I want to make it as waterproof as I can.

    Also, any ideas on Mapei Adhesive - Kerabond vs Keraflex Maxi? I've got porcelain tiles & sales person sold me Kerabond for wall & Keraflex Maxi for floor. I'm a little paranoid tiles will crack if I use Kerabond for wall as apparently it doesn't have flexi mechanism.
     
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  10. gcol

    gcol

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    You get plenty in the Bal kit so you should be fine. If I'm reading you right and you're thinking of tanking round the sink and toilet, then you're wasting your time - totally unnecessary.
    If you're tiling onto stud walls, you want to be using Keraflex.
     
  11. sjoe

    sjoe

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    Ok, got it. So emphasis is around the shower enclosure area only.

    My wall is a concrete block work, pipes then plasterboard on aluminium/steel frame. Still use Keraflex?

    I'm also tiling my kitchen floor which has floating floor - 100mm polysterene + 18mm chipboard. Unlike the bathroom which I'm retiling the whole room, the kitchen is built on top of the floating floor & I'm only going to tile the current vinyl area. Can I either
    1) tile on top of chipboard
    2) or replace chipboard with exterior ply, then tile on top
    instead of doing the proper job of putting a 4x2 timber on concrete, fill polysterene between the 4x2 and then only tile on top?

    Sorry so many questions.
     
  12. gcol

    gcol

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    Kerabond should not be used on plasterboard walls. To use Kerabond on plasterboard walls you'd need to be using Mapei's flexible additive. Even if you were tiling onto a solid wall, the fact that you're fitting porcelain tiles would also require you to add the flexible additive. So there's really no point, you're better just using Keraflex.

    No to both.
    No problem.
     
  13. sjoe

    sjoe

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    Thanks gcol. I'll return the Kerabond for Keraflex Maxi. Presumably I don't need to add flexible additive to Keraflex Maxi as it already have flexible additive on it? Tiles place did sell me fugolastic for the Mapei grout (not Ultracolour).

    Sorry but what should I use/do with the kitchen floor? As the cabinets are built on top of chipboard + polysterene, we don't touch the area. Does that mean, I need to gut out the places I could eg. fridge, dishwasher & washing machine floor area?
     
  14. sjoe

    sjoe

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    I know I've asked this question before but don't know the reasoning behind it... why is plasterboard + tanking before tiling better than using aqua panel + tanking? Is it due to cost & the effect is the same?

    I remember reading somewhere saying if using Aquapanel to apply something on top first before tanking. However, I rang Knauff & technical guy says to not use anything on top ie can tile directly on Aquapanel and that I must use Aqua panel jointing tape or their guarantee is void. I've already ordered Bal WP1 tanking kit thinking it doesn't matter what materials I use as I still have to tank it to make it waterproof. Anyone tanked their Aquapanel & have any problems?

    I know you jefoss & gcol have both confirmed using plasterboard + tanking but as plasterboard is not waterproof, I'm still feeling "unsafe".

    Joe
     
  15. lancenotalot

    lancenotalot

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