Depending on what s happening underneath the flooring these kinds of problems may be caused by among other things structure settlement or weak underlayment.
Tile floor cracking sound.
Occasionally a floor will sound hollow even when the tile is well bonded.
Perhaps the tiles are still partially attached at the corners or somewhere in the middle but it s just a matter of time before a hollow tile begins to crack.
The question to determine is where is the water coming from.
Answer answer i assume that the crackling noise that you are hearing can also be considered a squeaking sound that some say they hear on tile floors over wood sub floors.
If the paint is blistering then that could be a symptom of a water leak.
Subfloors need to be quite flat.
Floors that make a popping sound.
In far more instances the crack was caused by anomalies under or around the tile.
Grout hugs the edges of floor tiles and sometimes seamlessly blends with the tiles exposed surface.
Sometimes you might walk across your floors and hear a popping or creaking noise.
Cracked tiles on floors and walls is a problem because it can be difficult to track down the source of the crack.
In many cases the crack is not the result of an inferior tile.
If your wood floor is already down this might mean you have to pull up the section that squeaks to repair the subfloor and then put down a new section of flooring.
On the other hand if tiles are not bonded well then tiles and grout can crack and make a noise as they crack.
If your tile s crack seems to run along the tile s outer edge closely inspect the crack to determine if it s really on the tile or just.
If the floor sounds hollow does it mean my tile will crack.
Because you say that the tile floor in question is on the second floor i am going to assume that the tile is installed over a wood sub floor.
The snapping sounds are almost always traced to an uneven subfloor.
Laminate flooring materials don t tolerate humpy and bumpy subfloors.