On closer inspection i can see that the tiles are moving very slightly against the grout which is causing the sound.
Crunchy sound under floor tile.
At another location i can hear a popping sound.
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.
With structure settlement resolving floor problems may be a complicated and expensive ordeal.
Recently i noticed that a few of the floor tiles in the kitchen make a crunching sound when walked on.
This was in 2011 the grout has come off in different places and i can hear a crunchy noise when i step on a tile at one location.
Tile floors are very hard so walking on them transmits vibration very easily into the sub floor.
This serves two purposes.
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.
But if weak underlayment is the diagnosis there are two relatively simple and inexpensive possible remedies that can be used.
I had my kitchen remodeled with the floor tiled first on a wooden subfloor and cabinets installed the following day.
Tile floors are beautiful durable and a fairly diy friendly option but for tile s good looks to really last it s vital to start with what you can t see the ideal underlayment.
It ll be more to with how the floor was prep d by the tile what adhesive did he use and how he laid the tiles.
The first is to have tile glue injected underneath the tiles.
Grout will have very little to do with the failure of this floor.
With the glue down installation method you ll apply a strong adhesive directly to the subfloor and the wood floor is then installed on top of this adhesive.
A low tone is not a cause for immediate panic however.
It was coming from the tile in the laundry room.
This vibration travels through the floor directly into the ceiling downstairs.
There is a almost unnoticeable bulge where one of the tile comes up.
When the right soundproofing floor underlayment is installed directly under a tile floor the underlay absorbs footstep noise before it can vibrate through to the.
The noises happened regularly throughout the night.
A low pitched sound can also occur and not signify there is a problem the type of sound you hear also depends on the configuration of the tile assembly for example when tile is installed over a less dense substrate as in the case of wood a non bonded mortar bed a sound control mat or other membrane or over a steel framed wall.
Since this doesn t allow a small air gap between the wood floor and the subfloor this option eliminates that hollow sound and it makes engineered wood feel and sound like real hardwood.