Porcelain tile stain

[Tiler al]

Hi,I’m wondering if anyone can help on an issue i have with a stain on a porcelain tile,After grouting & the clean up a bucket was left on the floor overnight & the next day when removed the stain appeared underneath.I have tried with water a few times with no success & have left it over the weekend to see if it would dry out as thought it could of been trapped moisture but to no avail.I have enclosed a picture.Msny thanks for any advice.

 

[Time's Ran Out]

Take it up!

 

[Tiler al]

Would take it up but there is underfloor heating cable underneath that have been tiled over,have spoken to lithofin who have recommended there cleaner so will give that a go,just wondered if anyone had any ideas as to what it could be.

 

[J Sid]

If you slc over wires before tiling then no problem

 

[Tiler al]

Would normally self level over wires,but very small job that I wanted to tile over same day,has to happen on this one with no self leveller on.As of previous post will try stain remover & go from there,was more looking to see if anyone had any ideas as to what caused it & what it was.Thanks.

 

[Tony_C]

perhaps be grout residue. If the clean up bucket was left from cleaning the darker grout it could have ran down the bucket and pooled under it then dried up
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I'd be trying an adhesive cleaner and emulsifying pad to get it off

 

[Tiler al]

Thanks Tony, was thinking it probably was a grout issue & that does make sense with the bucket,have been advised to use lithofin cement residue remover,so will give that a go with a emulsifying pad tomorrow & see what the outcome is.

 

[Tony_C]

Good luck, hopefully it's an easyfix and lesson learned. Let us know how you get on 👍👍

 

[Tiler al]

Udate on stain,the lithofen residue remover got rid of it with ease,must of been grout residue from bucket.