Popping floor with tile grout cracking.
We built our home in 2003. It is wood frame construction and is very "solid" except for a problem that we have recently noticed just inside the back door (about 2 feet from the door).
When we walk across it there is a slight popping noise and the grout between the ceramic tile is cracking in that area. So it would appear that there is a bit of "give" in the subfloor?
How can we correct this? Am afraid to wait for fear that the damage to the floor will worsen.
Would really appreciate your input on this developing problem!