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Discuss Wet room, cement on top of Anhydrite screed in the Tanking and Wetrooms Forum area at TilersForums.co.uk.

  1. Adam18Spring

    Adam18Spring Active Member

    Location:
    Ipswich
    Hi guys
    Long time reader and lurker, got so much great advice...

    Quick question, i have a Anhydrite screed currently that was put down in a wet room (Wet UFH 50mm thick) it is currently 50mm lower than the finished floor height needs to be.

    My question is, would it be the following buildup be suitable:
    1: Prime Anhydrite with BAL DPM

    2: Apply adhesive BAL Rapid Set with uncoupling membrane BAL Rapid-Mat

    3: Build up to just under the finished floor level with sand cement screed incorporating my falls to the linear drain

    4: Tanking ontop of the new concrete (BAL Tanking kit)

    5: Tile etc

    Thanks
    Adam
     
  2. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    Yorkshire
    Perhaps ring bal themself Adam and ask them to spec it. Could you not stick a 50mm insulation board down and kill about 3 birds with one stone ?
     
    • Agree Agree x 2
  3. Adam18Spring

    Adam18Spring Active Member

    Location:
    Ipswich
    Thanks for the reply, I did consider that option but don’t want to lose the underfloor heating in the room. I have sent BAL an email as you suggested and will post there response when I get it
     
  4. Ajax123

    Ajax123 Tilers Forums Pro - Screed Advisor Trusted Advisor Professional Tiler

    Location:
    Lincolnshire
    What's the uncoupling membrane gonna do? Seems an unecessary expense and quite a lot of messing abot. Why not just use a 500gauge polythene membrane and 50mm fibre reinforced 4:1 sand cement screed. Make sure you tank the room properly before tiling
     
    • Like Like x 1
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