Browse Forums Flooring & Floor Covering 1 Apr 29, 2024 10:42 pm Have some black tiles in our bathroom on one feature wall laid on top of the waterproofing. What I think is efflorescence or white chalky looking grout has turned the black grout into a dirty white colour. This was noticed the day the tiles were grouted the first time. I'm happy to take the grout out and start again but I'm not sure which way to go about it? Any help? I've added some photos Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Black tile grout become a chalky colour. 2Jul 27, 2024 2:57 pm Black tile grout that was once dark has turned into a lighter, chalky color. Thanks all for your help I had an inspector who looked at over wall fall and full bathroom waterproofing, he said this will not be an issue as there is drain outside of… 4 3168 Hi everyone, Have just put a shower in the laundry and after only using it 2-3 times have noticed staining on the grout. The tiles were glued onto a concrete wall after… 0 6690 Thankyou for your advice. We do have Caesar coming out and hopefully resolve the issue for us. 4 21010 |