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Grout cracking issue

8526 Views 22 Replies 11 Participants Last post by  The Coastal Craftsman
Ok guys i have a customer with a sun room and his floor has a little to much flex for my likeing and his grout has started to lift and crack. I didnt lay the tile or build the sun room but he wants me to fix it. Problem is he put the tile down. He used Ditra ontop of 3/8th's which is not enough sub floor in my mind and this is the cause of the issue. Other than taking up the hole floor and beefing up the subfloor if there another way to repair the grout. Maybe a more flexible grout??

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I had a client who we did a couple of bathrooms for as well as a laundry room. On the first floor of the house they had tile from the front entrance, throught to the kitchen and dining room, and down a hallway to the garage. I noticed a few cracks when I first met them, but, it wasn't part of the job we ended up doing, however, while we were there, they asked what to do about this reoccuring problem. Seems the brilliant installers laid 1/4" mahogany ply over the old vinyl and 1/4" ply. They used some drywall nails and screws to improperly screw down the crappy ply they installed.

I was at a stage in the one bathroom where we were grouting so I took out of the worst spots and put in some epoxy (just to see what would happen)

It lasted about 4 months (longer than the traditional grout which would crack in a matter of days), however, (as noted above), the grout didn't crack - the tile did!

Their is no easy fix for problems like this, unfortunately. I have found 9 out of 10 times its a demo job followed by a proper substrate prep and proper install.

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