How not to grout ...

[tilernot]

Tiling floor with 3mm grout gaps. Removed all visible adhesive between tiles before letting it dry. Used Mapei Ultracolour grout. Ok so far I _think_

Then I started to go wrong (!!!). Mixed the grout too thin and after applying it I decided I'd wipe a little from the top with my grout sponge and then add more powder to the grout in the bucket and then apply that grout a second time to my lines.

Well it seemed ok at the time but after a day its left lines with different shades of grey. I'm almost certain its not the addy showing through. Its like you'd get 10cm of grey, then 15cm of lighter grey etc.

Obviously, I'm very pissed off. Its a very small bathroom so not sure if its that bad to rake out and re-do but at least if I have to do it again I'll know what not to do.

One thing I have noticed is that where I did the grouting well (on the walls) if the grout gets wet it changes colour dramatically. So I'm hoping that just maybe this grout on the floor hasn't dried fully yet but its been too days.... 8-( When we come to sell I'll make sure to tip a cup of water on the floor to get it all the same colour !

 

[Blunt Tool]

Tiling floor with 3mm grout gaps. Removed all visible adhesive between tiles before letting it dry. Used Mapei Ultracolour grout. Ok so far I _think_

Then I started to go wrong (!!!). Mixed the grout too thin and after applying it I decided I'd wipe a little from the top with my grout sponge and then add more powder to the grout in the bucket and then apply that grout a second time to my lines.

Well it seemed ok at the time but after a day its left lines with different shades of grey. I'm almost certain its not the addy showing through. Its like you'd get 10cm of grey, then 15cm of lighter grey etc.

Obviously, I'm very pissed off. Its a very small bathroom so not sure if its that bad to rake out and re-do but at least if I have to do it again I'll know what not to do.

One thing I have noticed is that where I did the grouting well (on the walls) if the grout gets wet it changes colour dramatically. So I'm hoping that just maybe this grout on the floor hasn't dried fully yet but its been too days.... 8-( When we come to sell I'll make sure to tip a cup of water on the floor to get it all the same colour !

You can try fine sanding the grout usually find that works and you could put a grout sealer on

 

[tilernot]

Thanks a lot for that suggestion! What would you use to avoid scratching the tiles (porcelain in this case) ? Maybe dremel or finger+sandpaper or multtool ?

 

[Blunt Tool]

Thanks a lot for that suggestion! What would you use to avoid scratching the tiles (porcelain in this case) ? Maybe dremel or finger+sandpaper or multtool ?

Finger and sandpaper you only want to surface sand no deeper

 

[Dumbo]

Mapei fuga frescia grout colourant in the colour that your grout is meant to be .

 

[GoneGuy]

As said, mapei fruga Fresca pen and let it dry and add a grout sealer to it to prevent them from darkening