Grout drying different colours

[rj1884]

Good evening. Just a quick question. When using a darker grout colour I find sometimes that on some of the lines the grout has dried slightly darker or lighter then the rest. From your experience any idea why this would be. Is it caused by wipin the excess grout off before the grout has had time to harden or something else. Many thanks.

 

[Mr Tiler]

Good evening. Just a quick question. When using a darker grout colour I find sometimes that on some of the lines the grout has dried slightly darker or lighter then the rest. From your experience any idea why this would be. Is it caused by wipin the excess grout off before the grout has had time to harden or something else. Many thanks.

i 'think' mate its not wiping off the excess grout too early, its leaving too much water on the grout, try rinsing your sponge more thoroughly when wiping down

 

[Sean SML Tiling]

Some places could be thicker than others which will cause it to dry slower. It could be efflorescence. Give it a few days before checking. Any pictures?

 

[TJ Smiler]

If it's a Mapei grout it seems to happen a hell of a lot.... Never get a problem with the stuff i use.

Efflorescence as Sml says is probably why though

 

[rj1884]

Hello guys. Thanks for your reply. I did notice that the particular area in question occurred after I did the first lot of grouting then wiped it down but had to fill little areas where is stupidly rubbed to much out of the joint. TJ, what stuff do you use.

 

[TJ Smiler]

Weber, i love everything by Weber. I'd cover my Mrs in it if she was up for it!!

 

[charlie1]

Weber, i love everything by Weber. I'd cover my Mrs in it if she was up for it!!

Lovely stuff!!... I'm using SPF White today ( purple bag)

 

[TJ Smiler]

Lovely stuff!!... I'm using SPF White today ( purple bag)

:drool5: Love it mate

 

[afright]

Used ultra color the other week that dryed patchy it was manhattan .Yep you cant beat Weber.

 

[Sean Kelly]

I try and only use Weber now. Did you know that the Weber standard grey is lighter (in colour) than the Weber silver grey!!!!!!

 

[kaharrison9]

My experience with Mapei ultra colour is that when doing floors the grout dry's absolutely consistent and true to the swatch-great.
When doing walls I have stopped using it due to the inconsistent shades-shocking
I have used every method regarding there grout for walls, measured and weighed the water and grout, virtually used no water when drying off,etc.

I do think it is something to do with the walls being vertical and floors horizontal and it been a rapid setting grout.

When we wash down a floor after the final wash down we leave the floor and all remaining water on the tile face stays where it is and gradually dries out.

When we wash a wall down after the final wash unlike the floor the water on the tile face gradually drains downwards towards the horizontal grout lines, builds up then in areas bleeds into the grout line and across. I think where it bleeds into the grout is possibly where these inconsistency's occur.

The floor grout is allowed to cure unhindered the wall grout as it is curing is still receiving water in an un deliberate way.

Hope it makes sense, my theory.

Kevin

 

[afright]

Good point.

 

[Stef]

My experience with Mapei ultra colour is that when doing floors the grout dry's absolutely consistent and true to the swatch-great.
When doing walls I have stopped using it due to the inconsistent shades-shocking
I have used every method regarding there grout for walls, measured and weighed the water and grout, virtually used no water when drying off,etc.

I do think it is something to do with the walls being vertical and floors horizontal and it been a rapid setting grout.

When we wash down a floor after the final wash down we leave the floor and all remaining water on the tile face stays where it is and gradually dries out.

When we wash a wall down after the final wash unlike the floor the water on the tile face gradually drains downwards towards the horizontal grout lines, builds up then in areas bleeds into the grout line and across. I think where it bleeds into the grout is possibly where these inconsistency's occur.

The floor grout is allowed to cure unhindered the wall grout as it is curing is still receiving water in an un deliberate way.

Hope it makes sense, my theory.

Kevin

This is probably the most rational explanation I have heard regarding shading of grout on walls.

 

[John Benton]

My experience with Mapei ultra colour is that when doing floors the grout dry's absolutely consistent and true to the swatch-great.
When doing walls I have stopped using it due to the inconsistent shades-shocking
I have used every method regarding there grout for walls, measured and weighed the water and grout, virtually used no water when drying off,etc.

I do think it is something to do with the walls being vertical and floors horizontal and it been a rapid setting grout.

When we wash down a floor after the final wash down we leave the floor and all remaining water on the tile face stays where it is and gradually dries out.

When we wash a wall down after the final wash unlike the floor the water on the tile face gradually drains downwards towards the horizontal grout lines, builds up then in areas bleeds into the grout line and across. I think where it bleeds into the grout is possibly where these inconsistency's occur.

The floor grout is allowed to cure unhindered the wall grout as it is curing is still receiving water in an un deliberate way.

Hope it makes sense, my theory.

Kevin

Completely agree Kev, I never seem to have shading problems with any floors only occasionally on walls

 

[kaharrison9]

I have scratted my head on a few times wondering why the floor was great yet the walls not when done at the same time with the same grout.

Interesting to know if this pattern has occurred with others with ultra colour