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Grout cracking issue

8520 Views 22 Replies 11 Participants Last post by  The Coastal Craftsman, 
The Coastal Craftsman
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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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About 20 years ago I did a shower with customer supplied tile. The customer also supplied this strange grout. It was a pre-mix, sanded grout, in a bucket. It seemed like latex caulk with sand in it. I don't know if it's available or how well it holds up. I did one shower pan with it and have never seen it again.

It was tough to work with, sticky like caulk.
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