I learnt in Belize they use garbage for fill, then build on top of that..
Ralphy
Some maybe close to ten years ago, here in Florida....I went to a house that had some floor tile in a rather long hallway that had 'steepled' in the middle of the length.....meaning two adjacent tiles managed to pop up on the joint, but the hallway was 3' wide....so 3 filed managed to pop up about 45* in the air.....
I went through the house full of tile, built on slab....and tapped with my rubber handle framing hammer....every damn tile was loose.....hollow sounding....
So I fixed the hallway, got paid, the lady commented her hubby had bounced golf balls off the tiles and so they knew they were all loose/bad....
and then when leaving I went and looked at the house from the driveway....
Mind you that this was a LARGE house at least 2400' itself, large inground pool, deck, leading to a inlaw/visitor sweet on the other side, near the garage/drive....
AND the house slab was about 8" lower then the general lay of the land around it....land went toward the house, and then sloped in to the foundation many inches lower.....
the house worth maybe 400k at that time, had sunken in to the ground....
reason, ILLEGAL building practices....the land under this house was filled in with the remnants of a FLORIDA SWAMP.....vegetable material, it rotted in the water filled natural swamp soil and so maybe 4 years later the tile popped, and the house was useless.....
:smash:

:surrender: