Slab foundation repair in San Diego. Lift, level, seal.

Modern polyurethane slab jacking is dimensionally precise to about 1/8 inch when the technician is good. Tile and hardwood usually survive lifts up to 1 inch. Larger lifts or older tile (1970s and earlier) often break and need to come up first. We tell you up front when we expect cosmetic damage.

We do a level survey, then look at the pattern. Settlement at one isolated interior point with the perimeter still level is usually a void under the slab (water washing out fines, a buried trash pit, an old plumbing trench). Settlement at the perimeter is usually soil bearing or expansive clay and needs underpinning, not just jacking.

Many San Diego homes built since the late 1970s have post-tensioned slabs. Steel cables are tensioned through the slab and anchored at the perimeter. When a cable corrodes or breaks, the slab loses some of its design strength. Repair involves cutting an access pocket, releasing tension safely, splicing or replacing the cable, retensioning, and patching. It is specialized work; never cut a PT slab without locating cables first.

Yes, frequently. A slow leak in a hot water line under the slab will wash out the fines under the slab over months and create a void. The slab eventually drops into the void. Step one is to find and repair the leak, step two is to fill the void with polyurethane or cement, step three is to re-level the slab.