1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Best way to lay low level shower tray on uneven concrete floor

Discussion in 'Plumbing and Central Heating' started by Ttron, 19 Jul 2020.

  1. Ttron

    Ttron

    Joined:
    8 Apr 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    Can someone please advise me on what's the best way to lay a low level stone tray (1400 x 800) on an un-level concrete floor? it's low by about 6mm on three corners. I've dug a channel to take the trap and waste. I've already tried with a bed of sand and cement but couldn't get it completely level so took it up and scrapped the sand/cement. Any advice would be very gratefully received, this is giving me insomnia!
     
  2. Sponsored Links
  3. plastic_peanut

    plastic_peanut

    Joined:
    2 Apr 2006
    Messages:
    463
    Thanks Received:
    60
    Location:
    Manchester
    Country:
    United Kingdom
    Expanding foam, i laid one in a former house. Was a low level tray but built up slightly on a wooden frame to give extra room for the waste.
    Was incredibly solid and never gave me any trouble. Would suggest priming the concrete first but you should be able to level it and keep weights on it once in position
     
  4. dilalio

    dilalio

    Joined:
    20 Mar 2009
    Messages:
    7,459
    Thanks Received:
    1,161
    Location:
    Potters Bar
    Country:
    United Kingdom
    Thicker bed of sand and cement 5:1 and furrow it... Don't make it so pi$$y that it oozes out the sides everywhere.
     
  5. Bodd

    Bodd

    Joined:
    7 Aug 2009
    Messages:
    16,887
    Thanks Received:
    761
    Location:
    Essex
    Country:
    United Kingdom

    I did that once to fill a channel under the tray. Come back in the morning and the tray was up in the air.

    Should have put some weigh on the tray I think.
     
    • Thanks Thanks x 1
  6. Ttron

    Ttron

    Joined:
    8 Apr 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    That's exactly what I did and the weight of the tray compacted it before I could get it level.
     
  7. Ttron

    Ttron

    Joined:
    8 Apr 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    That's what worries me about using foam. How to get and keep it level while it dries.
     
  8. Ttron

    Ttron

    Joined:
    8 Apr 2020
    Messages:
    7
    Thanks Received:
    0
    Country:
    United Kingdom
    This way would be fine if I wanted to raise it a bit as you did, the timber frame would supply the levels, but I need to keep it close to the concrete so the bottom of the tray stays below the tops of the floor tiles, when they are laid.
     
  9. Sponsored Links
  10. Madrab

    Madrab

    Joined:
    4 Oct 2012
    Messages:
    7,930
    Thanks Received:
    2,237
    Location:
    East Renfrewshire
    Country:
    United Kingdom
    I'm sorry but I just can't get my head around using expanding foam to take a reasonably large shower tray. I wouldn't ever consider using something that isn't designed to be load bearing, longer term.

    On a concrete base that can't be raised on a plinth then it's really got to be sand and cement or a good waterproof tiling adhesive to ensure its lasts. I'd be using plastic/wooden wedges to level and support it whilst it sets. A nice firm mix as @dilalio suggests so movement is minimal.
     
    • Thanks Thanks x 1
  11. johnny2007

    johnny2007

    Joined:
    11 Jan 2012
    Messages:
    3,417
    Thanks Received:
    517
    Location:
    London
    Country:
    United Kingdom
    I always used floor tile adhesive of good quality.
    My favourite is bal, but it's just personal choice
     
  12. denso13

    denso13

    Joined:
    22 Jan 2007
    Messages:
    4,929
    Thanks Received:
    1,064
    Country:
    United Kingdom
    Another vote for good quality tile adhesive....
     
    • Like Like x 1
  13. Jackrae

    Jackrae

    Joined:
    20 Nov 2012
    Messages:
    2,199
    Thanks Received:
    368
    Location:
    Dumfriesshire
    Country:
    United Kingdom
    A tip from an old plumber which I've used successfully was to mix up a bucket, of soft plaster then bed to tray onto that. The plaster is strong enough yet soft enough, to permit tray levelling. Once it sets ( an hour or so), job done.
     
  14. dilalio

    dilalio

    Joined:
    20 Mar 2009
    Messages:
    7,459
    Thanks Received:
    1,161
    Location:
    Potters Bar
    Country:
    United Kingdom
    If you know how to guage sand & cement, it's a no brainer... And also fulfills MI's of every tray I've ever laid that specifies such. :)
     
  15. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page