Shower tile grout problem

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  #1  
Old 02-18-15, 05:56 PM
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Shower tile grout problem

Hi,
I've noticed that the grout in the corner joints (where the wall meets the floor and the inside corner where the walls come together) keeps breaking up and falling out.

I've grouted the corners twice but over the months it still breaks up and falls out.
I'm attaching some pics to illustrate the issue. I wanted to ask...

-Are these joints too narrow to hold grout?
-Should I just clean them out and use caulk?

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  #2  
Old 02-18-15, 06:06 PM
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Any time there is a change in plane, corners and where the floor meets the wall, you should use a flexible caulk not grout. Go to a tile store and you can bet color matching caulking to mimic the grout you have in your shower. Redo, all inside corners with the caulking.
 
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Old 02-19-15, 04:46 AM
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Additionally, make super sure the tile and grout lines are DRY, not semi dry, but DRY before you apply the caulk. Set a fan in the shower if necessary to move air to dry it out. If you don't you will see mold appear from behind the caulk and you will have to do it over.
 
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Old 02-19-15, 11:22 AM
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In addition to the other good advise..... it can take a long time for the area behind the tiles to dry, even with a fan running 24/7. Hopefully it was built right, but no way to tell yet.

Also remember that the colored caulk comes in sanded and unsanded to match the grout type used. Oh, wipe the joints with Iso. alcohol before applying the caulk.

Jaz
 
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