Sub floor build up using NA maybe?

Discussion in 'Subfloor Preparation' started by TheGasMan, May 2, 2021.

  1. TheGasMan

    TheGasMan Member

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    Afternoon all,
    Newbie here so just be gentle-lol

    I’m after some advice please; I need to level a solid concrete floor that is A) main slab is made up of 3 different concrete pads B) bulk of the pad is covered with bitumen remnants.
    It is only 13 mtr2 in total with 3/4 of it covered in bitumen hence was thinking along the lines of Arditex NA? In the worse place the slab is about 20mm out so will need to build up with NA + aggregate but my question is this; should i mix & pour approx 18mm of NA+aggregate, let it go off and then do another mix of approx 3mm just NA!?
    I’m also a bit conscious of cost hence would any of you experienced folk do it another way or use a different product!?
    Thanks in advance for your help
     
  2. dazlight

    dazlight Super Moderator

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    Yeah NA with granno to get it close then full coat when level at 3mm
     
  3. TheGasMan

    TheGasMan Member

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    Nice one mate thanks - would you let the mix with aggregate go off before top coat mix? How long would you leave the aggregate mix up?
     
  4. dazlight

    dazlight Super Moderator

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    Yes I usually give it a couple of days to fully dry then DO the top coat.
     
  5. Lambchop

    Lambchop Well-Known Member

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    Hi, What’s going on top?
     
  6. TheGasMan

    TheGasMan Member

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    Hi,
    I’m prob going to to use an overboard underfloor heating system (omnie lowboard 15 more than likely) as the adjoining room is suspended timber floor so will use this system throughout the ground floor. You reckon this will be ok to do on top of the NA? what would you recommend to use for the dpm on top of the first mix of NA+aggregate?
     
  7. roxanabakers654

    roxanabakers654 Member

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  8. TheGasMan

    TheGasMan Member

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    Yes really!!!!!!!!!
     
  9. TheGasMan

    TheGasMan Member

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    I have built up the floor now and tonight used dpm1c and will give a top coat of NA tomorrow
     

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