kitchen floor tile popping up
We have a ranch-style home built on a slab. Over the past two weeks, we've noticed that one or two of the square-foot tiles in the kitchen floor has popped loose and rocks a little if you step on it the right way. That now seems to have spread out to five or six adjacent tiles. My suspicion is that the slab is buckling upwards under that point in the kitchen.
I've also noticed that the crown molding along the wall between the den and the kitchen (probably about six or seven feet away from the tiles) has began to pull away from the ceiling board. It makes me think that the wall is moving.
All of that being said, we bought this house about a year and half ago as a flipped foreclosure. I'm not sure exactly which parts of the workmanship are original construction from 1973, and which parts were patch jobs by the sellers. I'm willing to concede that it's possible that the tile floor was poorly installed on a non-level surface, and the slab itself is fine, and that the crown molding issue in the adjoining room is a red herring.
I'd hate to go to the trouble of fixing the tiles in the kitchen to discover that they were merely a symptom of an underlying problem. Before I go tearing up the floor in the kitchen, how can I make sure that I don't have a problem with the slab?
My wife is itching for me to break out a cold chisel and start pulling up tiles right now, but I'm thinking I need to get a better handle on the full problem first. Thoughts?