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-   -   Re-grout or caulk needed? (http://www.diychatroom.com/f80/re-grout-caulk-needed-157015/)

asbury park 09-16-2012 08:35 PM

Re-grout or caulk needed?
 
3 Attachment(s)
Our shower has developed a number of cracks in the grout. Most of them on outside corners. Question is should the outside and inside corners in the shower be grout or caulk? I assume the corners outside the shower should be grout.
The first two pics are from inside the shower. The second is of the outside.

Blondesense 09-17-2012 11:56 AM

Any change of plane (inside corners, outside corners, etc.) should be caulked, not grouted. I'd use a grout saw, remove it, and replace it with a matching sanded grout.

You said most of the cracks are on the outside corners. Are any of the cracks on a flat plane, in other words, not on or in corners?

DannyT 09-17-2012 12:35 PM

looks to me like the wood in the curb (if its made of wood) might be swelling from soaking up moisture. do you know what kind of waterproofing was used behind the tile? it looks like the tile have separated a little at the crack which makes me think you have water getting behind it.

asbury park 09-17-2012 05:41 PM

Quote:

Originally Posted by Blondesense
Any change of plane (inside corners, outside corners, etc.) should be caulked, not grouted. I'd use a grout saw, remove it, and replace it with a matching sanded grout.

You said most of the cracks are on the outside corners. Are any of the cracks on a flat plane, in other words, not on or in corners?

Replace it with matching sanded grout or sanded caulk? There are one or two very tiny hairline cracks on a flat plane. That's it.

asbury park 09-17-2012 05:42 PM

Quote:

Originally Posted by DannyT
looks to me like the wood in the curb (if its made of wood) might be swelling from soaking up moisture. do you know what kind of waterproofing was used behind the tile? it looks like the tile have separated a little at the crack which makes me think you have water getting behind it.

Not sure what kind of waterproofing is behind it.

Blondesense 09-17-2012 06:07 PM

Quote:

Originally Posted by asbury park (Post 1011896)
Replace it with matching sanded grout or sanded caulk? There are one or two very tiny hairline cracks on a flat plane. That's it.

Sorry, my bad. Matching sanded caulk.

Blondesense 09-17-2012 06:42 PM

Quote:

Originally Posted by DannyT (Post 1011694)
looks to me like the wood in the curb (if its made of wood) might be swelling from soaking up moisture. do you know what kind of waterproofing was used behind the tile? it looks like the tile have separated a little at the crack which makes me think you have water getting behind it.

Very possible. It is also possible whoever built it used PT wood and it is warping as it dries. At this point, without knowing how it was built or what materials were used it is all a guessing game (unless you have an access panel for the plumbing).

If it was just the corners cracking I would blame the pivot door, replace the grout with caulk and cross my fingers.
But cracks on the flat plane suggest there could be underlying problems concerning how the shower was built or waterproofed. No way to know for sure without tearing the thing apart.

In your shoes, I wouldn't tear it out for two small cracks, but I would take some good clear pics so I could keep an eye out to see if it is getting worse.

In my shower, before I tore the whole thing out, I could feel the bottom two rows of tiles move as if the drywall underneath had turned to mush (which is exactly what had happened).


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