A raised foundation settles at its supports, and the floor tells on it.

Raised Foundation Settlement: diagnosed and explained.

A raised foundation does not sit on one continuous slab. It stands on a perimeter stem wall plus a field of interior piers, each with its own small footing, and each footing depends on the soil directly beneath it. That is the whole vulnerability: a slab spreads its load across a large area, while a pier pad concentrates it on a footprint the size of a stepping stone. When the soil under a run of piers shrinks, washes, or compresses, those supports drop and the floor above drops with them, which is why raised foundation settlement usually reads as a tilt across a room rather than a dip in the middle of one. That distinction is the diagnosis. A dip between supports is a framing question and belongs with joist and beam repair; a plane that tilts toward one corner of the house is the foundation itself moving, and that is this page. In Southern California, Arizona, and Nevada the usual drivers are expansive clay cycling between wet winters and long dry summers, runoff carving out the soil under a perimeter footing, and cut and fill hillside lots where the fill side consolidates for decades after the house went up. The pattern compounds because a settled pier sheds its share of the load onto its neighbors, so the movement spreads along a line rather than staying put. The repair is not carpentry. It is carrying the load down to soil that will hold it, which is what post and pier foundation repair does.

For the repair side of this, the foundation repair solutions page lists every method Dalinghaus installs, including the ones that fix problems other than raised foundation settlement.