Granfix Grey Grout Dried Different Colours

[Ivan Rubery]

It's more than likely moisture evaporation causing the dark patches , if you grout to early when using a dispersion adhesive , then staining can occur as the moisture leaches through the joints.

Ok thanks. I did leave for couple days. I have another question, is there a minimum bed thickness for floor tiles to stop height being raised too much. They are going on to hardie backer

 

[AliGage]

How long have you been tiling @Ivan Rubery

 

[Ivan Rubery]

How long have you been tiling @Ivan Rubery

Hi, well. I have done a few jobs, tiling not my main area probably about 1 year. I have a large floor trowel with a 10mm half moon recess which i would always use on a floor, however, trying to keep floor height to minimum, just thought i would ask the question if a thinner bed such as 6mm would be an option. I realise tiles on floor need good contact, due to them being stood on and weight bearing down such as toilet pans and people. Thanks

 

[AliGage]

And this is a PAYING client?

 

[Ivan Rubery]

And this is a PAYING client?

Yes it is, it's fine, i just wanted some advice, that was all

 

[Ivan Rubery]

Yes it is, it's fine, i just wanted some advice, that was all

I just wanted some advise as i had loads before about the chipboard and went with hardie backer. I am sure there are lots of tilers who want advice now and again. Thanks

 

[AliGage]

Ok (bites tongue)......

Your grouting is clearly efflorescence. You've used far too much water to wash down. You can see where water has been left within the joint, particularly on the corners.
Charcoal I find is one of the most sensitive colours to this. Would of been an advantage, so something to do in the future, after your last mop run over with a soft cloth to remove any excess water. Then once dry buff to remove any remaining grout residue.

Floor tiling: 6mm is no good for any tile on the floor IMO. What tiles are you fixing?
Depending on how good and flat your surface is you could possibly use an 8mm but generally speaking a 10mm notch is used.

 

[Ivan Rubery]

Ok (bites tongue)......

Your grouting is clearly efflorescence. You've used far too much water to wash down. You can see where water has been left within the joint, particularly on the corners.
Charcoal I find is one of the most sensitive colours to this. Would of been an advantage, so something to do in the future, after your last mop run over with a soft cloth to remove any excess water. Then once dry buff to remove any remaining grout residue.

Floor tiling: 6mm is no good for any tile on the floor IMO. What tiles are you fixing?
Depending on how good and flat your surface is you could possibly use an 8mm but generally speaking a 10mm notch is used.

Thankyou. I appreciate it must be very frustrating when basic type questions are asked, but as most people i don' t like making mistakes or a bad job. I have and i am learning all the time and the grouting finish is the first time this has happened to me. Thanks

 

[Tile Shop]

Can't tell very well from the pics, but can you confirm the size of the tile and whether it is ceramic or porcelain?

 

[Dave]

Ok thanks. I did leave for couple days. I have another question, is there a minimum bed thickness for floor tiles to stop height being raised too much. They are going on to hardie backer

They depends how thick you used it and the tile size.
As for the floor , minimum bed depth will be on the bag ,

 

[Ivan Rubery]

Can't tell very well from the pics, but can you confirm the size of the tile and whether it is ceramic or porcelain?

Hi Paul. The tiles are 500 x 250 ceramics.
Cheers

 

[Ivan Rubery]

They depends how thick you used it and the tile size.
As for the floor , minimum bed depth will be on the bag ,

Blimey, there are so many variables when it comes to tiling. Tiles were 275 x 275

 

[Ivan Rubery]

I thought it would be good to end this thread on a positive note. Floor went down well on hardie backer boards and really impressed with the stability of these. Thanks to all with advice. Used a "normal" floor trowel and height of floor acceptable. The bathroom looks good and customer happy after all. I'm working on perfection and nothing less, maybe one day i will be giving others advice who seek help. Thanks to all

 

[Old Mod]

I thought it would be good to end this thread on a positive note. Floor went down well on hardie backer boards and really impressed with the stability of these. Thanks to all with advice. Used a "normal" floor trowel and height of floor acceptable. The bathroom looks good and customer happy after all. I'm working on perfection and nothing less, maybe one day i will be giving others advice who seek help. Thanks to all

Glad it worked out for you @Ivan Rubery
Did u sort the grout problem, I know u said u had to change the colour.
Did u?

 

[Andy Allen]

Well effervescence is gas bubbles in a liquid haha sorry Steve couldn't help it!

Efflorescence is the formation of salt crystals after water carrying these salts evaporates.
Most common cause is over washing with a sponge that is saturated with water or standing water in the joints.
If it's light and dark grey it could well be efflorescence.

Grey grout is dark when wet, efflorescence would turn it light grey.
How long has it been since u've grouted?
Or has the area been subject to premature heavy wetting?
Or is room very humid?
Or even grouting too early I'd addy hasn't set properly.
These can cause efflorescence
(derived from Latin word meaning "To Bloom")

U can generally remove it with a Phosphoric acid based tile and grout cleaner.
Obviously test small descreet area first.

Spot the nerdy kid......lol