Recommendation: Grout problem, grey.

[bal]

Tiled a stone floor recently with bal grey flexible floor grout , cleaners have gone over floor with cleaning machines which have circular scouring pads which rotate also water is added to process of cleaning .Basically grout lines now are no longer grey but are light in appearence and seem to have lost the pigmentation ,been over light areas with clean wet sponge darkend whilst wet then went back to light colour, dont want to regrout but find a dye or solution to problem. Any suggestions would be appriciated to get back the grey colour, cheers.

[Dave]

How long after the job was finished did they do this cleaning..?

[bal]

3 days

[Dave]

Too early....the water has more than likely drawn polymers from the grout to the surface.......

Did they do this under instruction from someone..?..

[bal]

clients instructions , im not been blamed but i did say that cleaning proccess was too abrasive but thats contrary to what you have just told me , have you got any ideas to rectify problem that doesnt include regrouting ?

[bal]

forgot to ask how long is recomended drying period ?

[Dave]

This could 2 probs here...

1 as i said polymers....

2 . efflorescence....

Firstly i would try a cleaner..something like Lithofin cement away...good for efflorescence....if this doesn't work then maybe a grout colourant....but firstly i would make a call to the grout manufactures tech line and see what they say...

[bal]

Thanks for your advise ill try those options , cheers Bal.

[Dave]

forgot to ask how long is recomended drying period ?

The set time is 24 hrs..but i think the full structural strength is about 3 weeks..but i'm sure any Bal reps could clarify this..