Grout keeps crumbling in one area

Welcome to our Community
Wanting to join the rest of our members? Feel free to sign up today.
Sign up
Nov 21, 2011
72
20
8
FL
Real Name
Oleg Dmitriyev
Business Location
United States
#1
We did a simple ceramic tile & grout clean and clear seal job for one customer, everything came out well then his wife called us and wanted us to come out again and fix some of the grout that she's been having problems with. I came and inspected and saw that in some areas the grout was just crumbling. The customer told me that the floor was installed about 6 months ago and she has been having problems with those areas since it was installed. I re-grouted those areas with the original left over grout that they had and it seemed fine. After a week or so she calls back and says it crumbled again, so I thought that the grout was expired. The next time I came in I brought my own grout that's been sitting in my van for about a month and it gets really hot in my van and humid, but the grout didn't turn hard or anything so it seemed fine, so I used that grout. After a week she calls me again says that it crumbled in the same place... (in her laundry room) so I went out to inspect and it was crumbling on top again. We did the same process, used the same grout in other areas but those areas are fine, the only problems are in the laundry room. So I'm planning to re-do those areas in the laundry room with unopened, fresh grout because I'm guessing that the grout is too old or has seen too much humidity. Has this ever happened to you? What is causing the grout to crumble just in that specific area? I scraped the old grout down to the thinset and cleaned it out before applying new grout, I've never had this happen to me before. Here are some pictures.

http://i1077.photobucket.com/albums/w480/odmit16/20120723_145241.jpg
http://i1077.photobucket.com/albums/w480/odmit16/20120723_145229.jpg
http://i1077.photobucket.com/albums/w480/odmit16/20120723_145143-1.jpg
 

Tron

Well-Known Member
Aug 3, 2010
14,886
43
113
Business Location
United States
#2
There's probably flex in the subfloor.

Not properly reinforced.

The flex will crack out the tile bad.

Side thought: could her washer/dryer be an older one that vibrates horribly?
 
Nov 21, 2011
72
20
8
FL
Real Name
Oleg Dmitriyev
Business Location
United States
#3
The tiles do not move, and the grout isn't really cracking, it just crumbles on top. Just looses it's stickiness. The area that i'm talking about is about 1 ft away from the washer and the washer/dryer doesn't look old. Everywhere else in the laundry room the grout is fine except like 3 or 4 areas that are about half a foot long.
 

groutguy

Well-Known Member
Mar 9, 2008
1,639
752
113
Fredericksburg Virginia
pristinepete.com
Real Name
Peter Diehl
Business Location
United States
#6
Looks like it got wet before it fully cured or maybe she has a dog that may have pissed on it? I'm assuming you know how to mix and install grout, as some folks like to "overwork it" with the sponge drawing the "cream" to the top leaving it weak and crumbly.

Like you said it could be bad grout too, I've seen it before.
 
Nov 21, 2011
72
20
8
FL
Real Name
Oleg Dmitriyev
Business Location
United States
#8
the customer has 3 dogs and she said that she had the laundry room door closed until the grout dried (lightened up).
 

Latest posts