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Discuss SLC mistake on floor. in the DIY Tiling Forum area at TilersForums.co.uk.

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  1. NewbieTiler99

    NewbieTiler99 Active Member

    Location:
    South
    Ok, before i start, I totally misread (as in missed!) the priming instructions on the Mapei 1210 SLC and didn't prime my floor before adding the SLC in my understairs toilet :(

    Anyway, I poured the well and correctly mixed SLC over old black tile adhesive and everything thus far seems ok! The old adhesive was tested for Asbestos and came back positive but was in a good state, not tacky and very very thin.

    It's been 72 hours since the pour and the SLC is sound and i haven't noticed any cracks or hollow sounds upon tapping. I know I've messed up but i wanted to know how long will it be before the floor fails, if it is to fail.

    Thanks in advance!
     
  2. pdc

    pdc Only a Handyman... Trusted Advisor Professional Tiler

    I wouldn't be losing any sleep over it, unless your understairs toilet is 100m2...
     
    • Agree Agree x 3
  3. NewbieTiler99

    NewbieTiler99 Active Member

    Location:
    South
    I assume the room size will make a significant difference?
     
  4. Nic_P74

    Nic_P74 TilersForums.co.uk Addict

    Location:
    Oxfordshire
    If it does go wrong it's only a couple of square metres to sort out. Not 100 :thumbsup:
     
  5. Nic_P74

    Nic_P74 TilersForums.co.uk Addict

    Location:
    Oxfordshire
    And also yes smaller areas have less chance of movement
     
  6. Tom Astley

    Tom Astley Trusted Advisor Professional Tiler

    Location:
    Manchester
    I thought the smallest room in the house has the most movements?......
     
    • Funny Funny x 4
    • Agree Agree x 1
  7. Nic_P74

    Nic_P74 TilersForums.co.uk Addict

    Location:
    Oxfordshire
    And the largest :tearsofjoy:
     
  8. NewbieTiler99

    NewbieTiler99 Active Member

    Location:
    South
    Thanks for the feedback all. I'm going to leave it as long as possible before i tile the SLC to observe any cracks etc. Just to be on the safe side.

    As an aside, if it does fail, can i remove any debris and simply overboard the floor? I wouldn't want to rip out all the SLC for fear of disturbing the bitumen.

    Thanks
     
  9. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Yorkshire
    Tile it and don't worry !
     
    • Agree Agree x 2
  10. Plan Tec Tiling

    Plan Tec Tiling Administrator Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    Wimborne, Dorset
    You will be fine
     
  11. pdc

    pdc Only a Handyman... Trusted Advisor Professional Tiler

    72 hours is more than long enough for it to dry, unless it's 150mm deep! Prime it, tile it, and enjoy it:mask:
     
  12. Waluigi

    Waluigi Guest

    You mention that you poured the SLC over ‘old black tile adhesive’ and that came back positive for asbestos. Was this Bitumin? And were the old tiles Marley style vinyl tiles?
     
  13. NewbieTiler99

    NewbieTiler99 Active Member

    Location:
    South
    Yes that's right. The asbestos report said Bitumous type product and the old tiles were thermoplastic. The tiles were removed however.
     
  14. Waluigi

    Waluigi Guest

    Understood.

    Yes, standard primer wouldn’t have been enough anyway, it needed either a slurry coat of tile adhesive and SBR or Eco Prime Grip some people use.

    It’s unlikely that the SLC will bond properly to the Bitumin and might fail after a few seasons.
     
    • Agree Agree x 1
  15. NewbieTiler99

    NewbieTiler99 Active Member

    Location:
    South
    Ah ok. Well as others have said, it's a relatively small area so if it does fail, it'll be annoying but nothing i can complain about due to my own mistakes!

    I guess I'll cross that bridge if it comes to it and keep my fingers crossed in the meantime!
     
    • Like Like x 1
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