NA > DPM 1C - how long?

Discussion in 'Subfloor Preparation' started by Richard, Apr 26, 2013.

  1. Richard

    Richard Active Member

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    How long to wait after laying NA before DPM 1C can go on top?

    ta,
     
  2. tarkett85

    tarkett85 Well-Known Member

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    leave it for 8 to 12 hrs
     
  3. Richard

    Richard Active Member

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    That's longer than I anticipated...this is after the 1st coat of NA and before the DPM goes down.

    NA > wait 8 hours > DPM 1C > wait 8 hours > NA

    That would make it a 3 day job, no?

    Cheers,
     
  4. bournemouth

    bournemouth Super Moderator

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    Does the screed have a dpm if so could you not use l3 gold ?
     
  5. dazlight

    dazlight Super Moderator

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    I've gone over the 1st screed after 3 hours.

    Get room warm with good airflow.
     
  6. bournemouth

    bournemouth Super Moderator

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    Daz do ardex do an accelerator for the dpms ?
     
  7. dazlight

    dazlight Super Moderator

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    Think they do yeah or a quick drying version???
     
  8. dazlight

    dazlight Super Moderator

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  9. Richard

    Richard Active Member

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    We're not sure, one of the reasons we're going with DPM 1C.

    That sounds a bit more like it!

    Edit: just had conformation back from Ardex "when you can walk on it"

    The spec says the working time is 20 minutes. I'm wondering whether to cover 45m2 we'd be better off with several smaller (2x10kg & 1x6kg) tins rather than 25kg?
     
    Last edited: Apr 27, 2013
  10. mjfl

    mjfl Well-Known Member

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    I did a 45m2 job and had the 6kg left over, but take it with you just incase....
    screeded first day, made it my last job of the day, back in the morning to dpm, camre back in the the afternoon and screeded again, it's ok if it's tacky but must not transfer from the floor to you.. lol
     
  11. tarkett85

    tarkett85 Well-Known Member

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    Richard the working time isn't when you can walk on it, only how long after mixing it's workable in ideal circumstances. Didn`t read your post correctly sorry when you can walk on it is when you can apply DPM 1C, then let it go tacky and coat again with NA. EAasy way is to screed in the morning, DPM in the afternoon , then screed in the morning again and hope it dries in time, usually does.
     

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