SLC mistake on floor. - TilersForums.com

NewbieTiler99 · Feb 18, 2019

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!

WetSaw · Feb 18, 2019

I wouldn't be losing any sleep over it, unless your understairs toilet is 100m2...

NewbieTiler99 · Feb 18, 2019

pdc said:
I wouldn't be losing any sleep over it, unless your understairs toilet is 100m2...

I assume the room size will make a significant difference?

Nic_P74 · Feb 18, 2019

NewbieTiler99 said:
I assume the room size will make a significant difference?

If it does go wrong it's only a couple of square metres to sort out. Not 100

Nic_P74 · Feb 18, 2019

And also yes smaller areas have less chance of movement

Bill · Feb 18, 2019

Nic_P74 said:
And also yes smaller areas have less chance of movement

I thought the smallest room in the house has the most movements?......

Nic_P74 · Feb 18, 2019

And the largest

NewbieTiler99 · Feb 19, 2019

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

Flintstone · Feb 19, 2019

Tile it and don't worry !

Qwerty · Feb 19, 2019

You will be fine

WetSaw · Feb 19, 2019

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

Waluigi · Feb 19, 2019

NewbieTiler99 said:
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!

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?

NewbieTiler99 · Feb 19, 2019

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

Waluigi · Feb 19, 2019

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.

NewbieTiler99 · Feb 19, 2019

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!

SLC mistake on floor. - TilersForums.com

NewbieTiler99

TF

WetSaw

NewbieTiler99

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Nic_P74

TF

Nic_P74

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Bill

Nic_P74

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NewbieTiler99

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Flintstone

Qwerty

WetSaw

Waluigi

NewbieTiler99

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Waluigi

NewbieTiler99

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