Question about 2003 Harley Davidson XL 883 R Sportster
I have a similar problem. My builder used dimensional lumber for the joists. I asked him if thet would be sufficiently stiff for tile floors, and he said yes. Then after the cracks started, I asked him why the cracks, but he said he didn't know why. It's not necessarily the subfloor but the combination of joists, subfloor, and concrete backer boards under the tile. If you can access the joists under the floor, perhaps you can reinforce them with additional joists or stiffeners before regrouting.
As for me, I have done neither so far. Wife has not complained, so I spend my spare time helping people on FixYa. Like you, I fear regrouting will just lead to recracking, and I no longer have access to the joists. :o(
By the way, your question was sorted as a Harley Davidson question. You weren't riding you bike in the kitchen, were you?
Posted on Sep 10, 2010
Testimonial: "Ha ha! I wish that were the cause (the Harley - I had another question - my bad!) that would make a great story. Thanks for your help!"
Grout will crack up and tiles will crack due to any movement in the sub floor. If the grout is cracking out in one specific place in the floor, than that is the location of subfloor and/or joists that have movement. There are many reasons for movement. The main reason is builders will nail down subfloor instead of screw them down. Nailing will always cause problems in the future. Another is when screwing the subfloor down, it is imperitive to hit the joists to stop movement. If your basement is unfinished, have a look and see if there are nails or screws. If you see any, than they missed the joists. That would be the problem.
Posted on Oct 31, 2013
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Posted on Jan 02, 2017
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