Flooring is by no means beneath me, but I haven’t really done anything below a shoe molding. So question for the tile high club: What would you do in the pictured situation? These are floor sections that have always felt a bit “squishy”. Today they finally popped up into the tent formation you see here.
Wait for it to settle and then add glue to keep it down? Cut it to fit?
Additional context:
I did not do this install myself, so the history is a bit of a mystery. This is installed in a full bathroom and is made of what feels like a smoothed slate material. I believe it is a composite tile.
More photos for context:
I would lead with questions for both context and for you to determine your plan of action.
Its "always been" squishy...how long have you lived here? 1 year? 10 years? It matters in the context of if it was a quick flip install to sell the place and you've only been living there a short time, the rest will probably be falling apart soon too. If its been a long time, it could point to just that spot being an issue and needing repair.
There's also the question of your time and budget. There's a good chance the entire floor needs to be replaced, but if that's just out of the question then a patch job could keep it together a very long time if done right.
What room is that? Bathroom? Mud room? There's tile on the wall too so I'm wondering if water is playing into the problem (either in the tile install or damage to the sub floor in that spot).
I’ve been here for 2 years. I believe at least the tile flooring in the 2 bathrooms and kitchen all are subject to similar poor craftsmanship.
Regarding budget vs time, time is the limiting factor. I’m in a HCOL area and will be getting some estimates in the near future from contractors.
Make sure to ask the contractors about the subfloor. If its flexing at all (you can step on the empty space and see if your weight shifts it) then no matter how good the fix it'll pop again.