Please help - recent floor tiling job but grey grout instantly turning white

[tjmerwanji]

Hi guys,

I really need your help! I have just had a tiler install tiles throughout my house over the last week, with grey grout everywhere. He grouted the tiles only on Friday I believe and having looked at them over the last few days, all the grout is slowly and steadily turning white (into a chalky colour - picture attached below).

I'm literally stuck as I'm not sure where it's coming from. I've read about salt efflorescence and I'm starting to think it's that, but better yet what can I do about it as a matter of urgency? I tried rubbing the grout with a damp cloth and temporarily it removes the whiteness then just turns grey again after 5 minutes or so. With other deadlines in the house looming I just wanted to know if any of you guys had any ideas of what I could do? There's a photo attached to illustrate the problem.

PLEASE HELP!

THANK YOU!

 

[Mike]

that may well be the natural colour of the grout after drying out. grout always looks darker when wet. still looks dark to me in the pic tho

 

[tjmerwanji]

Thing is on the corners it's a deep grey and doesn't seem to be changing. It's just in the middle it's turning whiteish (kinda chalky) and from what Topps Tiles have been saying, the deep grey is the colour...

Any way to rectify that? Regrout, pen, grout residue remover??

 

[DHTiling]

Was it flexible grout... looks like latex leaching from over washing or washing to early.

 

[peckers]

Is this the wall all floor?
what substrate is it on?
what adhesive was used?
What grout was used?

ok its the floor just noticed.

 

[Mike]

you need to let it all dry out and then take a look again. if there's still 2 shades it will be hard to rectify it. if you put a colour pen on it both shades would change again. as for re-grouting i'd not do that till i know what caused the problem initially.

 

[The D]

try using Cement, Mortar and Efflorescence Remover.

 

[Bathfix Bob]

All the bathroom floor tiles I do does this, I use Webber flexible grout (grey) and a flexible additive, it looks fine when wet but dries a uniform light chalky grey but looks okay and never had any complaints.

I wipe off carefully with a damp cloth about half an hour is this too early?

 

[Daz]

I know we are talking about grout discolouration, but is it the camera angle or are the grout joints uneven and tapered too?
Pictures don't always illustrate the issue clearly. Where are you? I'm sure there must be a member on here that is local to you and prepared to find a few minutes to take a look and provide some advice.

 

[tommyzooom]

I think it is too early to judge, I believe it is still drying out, and will all dry to the lighter colour in another couple of days