Applying Epoxy DPM over new concrete screed.

Discussion in 'Subfloor Preparation' started by DIYConvert, May 16, 2022.

  1. DIYConvert

    DIYConvert New Member

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    Hi, I have a rough concrete floor which has a bitumen dpm on top but still has rising damp, I am covering the lot with a sand cement screed after priming with SBR and want to apply a 2 part epoxy DPM to sort out the damp once and for all. Could you please let me have your opinions on:
    How long should I wait after laying the sand cement screed before applying the DPM.
    Once the DPM is applied and cured could I then glue down engineered wood boarding as if the screed were 100% dry?
    I cannot get an answer from the DPM manufacturer or flooring suppliers on this one?
    Many thanks for any help.
     
  2. J d clarkson flooring

    J d clarkson flooring Well-Known Member

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    How thick do you intend to apply the new sand/cement screed.
    If you have rising damp you may be better grinding the bitumen off and then applying a dpm then ardex a35 mix.
    I’m sure ardex would be able to advise the best course to take
     
  3. tarkett85

    tarkett85 Well-Known Member

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  4. merit

    merit Well-Known Member

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    If your putting down a sand and cement why wouldn’t You just put a visqueen dpm sheet under it? You could then dpm the new screed after it’s cured and bond engineered to that
     
  5. tarkett85

    tarkett85 Well-Known Member

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    Still needs a surface dpm for bonding of wood


    Sent from my iPhone using Tapatalk
     
  6. merit

    merit Well-Known Member

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    Yeah of course. Still need to dpm the new screed after it’s cured
     

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