Sunken, uneven concrete sidewalks, tilted driveway panels, and sloping garage floor slabs are pervasive across Olympia, Lacey, and Thurston County. When poor soil compaction, buried construction debris, or winter rain washouts create voids beneath concrete slabs, the unsupported concrete settles and fractures under its own weight.
For decades, the standard repair method was 'mudjacking' (also called slab jacking). Contractors drilled large 2-inch to 3-inch holes across the concrete and pumped a heavy slurry of topsoil, water, and Portland cement under high pressure to hydraulically lift the slab.
In Western Washington's saturated soils, mudjacking has severe inherent drawbacks. The injected slurry adds massive dead weight—over 100 to 120 pounds per cubic foot—directly onto the same unstable, saturated soil that failed in the first place, frequently causing secondary settlement within 12 to 24 months. Furthermore, the large drill holes leave unsightly, patchwork scars across the concrete.
Modern concrete lifting relies on high-density expanding structural polyurethane foam (Poly-Leveling). Our technicians drill tiny, pencil-sized 5/8-inch ports in the sunken concrete. We inject a specialized two-part hydrophobic polymer that expands rapidly beneath the slab, filling voids and exerting precise lifting force with sub-millimeter control.
Polyurethane foam weighs only 2 to 4 pounds per cubic foot—adding virtually zero overburden weight to fragile soils. It is 100% waterproof, will never wash away or erode during heavy Pacific Northwest rains, cures completely in just 15 minutes, and allows full vehicle traffic immediately upon completion.