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Grout cracking issue

8523 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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If the tile is still attached to the substrate it is possible to beef up the plywood from below. I wouldn't be guaranteeing anything with the tile already set though.

But as mentioned you need joist spans, depths, centers and a real understanding of what is under the tile. Don't take the ho's word for it! He has already established he doesn't know what he is talking about. When he says 3/8 ply is he talking over the sub-floor or is that the sub-floor? (Unbelievable that would be)
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