Efflorescence

[brian c]

Re: Efflorescence
permalink

Effloresence is just salt migration from the substrate or adhesive bed.... i can't see it causing the grout to break down and come out of the joints..

Dave thats what i couldnt understand.

 

[Ajax123]

Hi Sean, What is the substrate?

Took the words right out of my keyboard

is there any sign of the tiles delaminating and moving?

 

[jamie B]

be interested to know what happens as I have a similar prob with BAL wide joint at the the mo..please keep us updated!

 

[DHTiling]

Hi Sean, What is the substrate?

Took the words right out of my keyboard

is there any sign of the tiles delaminating and moving?

Seen as no ufh.. then i presume timber of some sort..as super flex grout was used.

 

[Ajax123]

I suppose efflorecence makes some sort of sens in a wide joint grout as it offers a much wider area for the migration of moisture from the substrate or addy bed. the wider it is the faster it will allow the moisture to escape and so the more chance of efflorecence.......as has already been said though this would not cause a cementitious grout to "break down"

 

[Rob Z]

Sean, I was thinking of two things...first, if this is SOG with no vapor barrier, then a constant stream of moisture rising through the slab would show itself in the grout (unless the tile was set over a vapor-blocking sheet membrane).

Also, I would talk to the customer and find out what the cleaning routine is for this installation. I have inspected jobs where the cleaning crew was practically flooding the floor with water and cleaners, and then of course all that water had to go somewhere and then reappear somewhere, usally causing staining of some sort. A common statement that I have heard is "We clean it all the time and no matter what we do this stuff keeps showing up on the surface".:mad2: