I'm a DIYer dealing with a stone floor where the backer board seams were not taped. I'm also pretty sure the floor doesn't meet the required deflection standards. Predictably, the tile has cracked along every seam in the backer board.
Is there anything that can be done to save this floor? I've read that you can fix cracked tiles with epoxy or color matched caulk (!?), but since this is a symptom of an underlying problem, won't these fixes just fail too?
If I install blocking on the floor to reduce the movement, can I pull up the tile along the seams, sc**** the thinset back, tape the seams and re-lay?
Preemptive defense: I wasn't the one who did the job!