I've just had my bathroom tiled and the grout seems to be quite powdery when I run my finger along it. Is this alright?
The grouts used were Mapei ultracolour black and white and were mixed to a creamy consistency. The black seems to be much worse than the white ... or maybe it shows up more! Do I need to apply something over it? I'm concerned about using my shower before I know if it's ok.
give it a good wash with a wet sponge and dry it off with kitchen towel. repeat. this will remove any residue.
if still powdery after this then there is a problem. you may wish to contact the manufacturer directly. i've had tremendous problems with mapei grout in the past on more than one occasion. i boycott it now.
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