How does concrete leveling work?

We lift your concrete using quality, USA made polyurethane foam. First, small holes—about the size of a nickel—are drilled through the slab. The foam is then injected into the holes. The foam expands, filling voids in the soil and lifting the concrete. Additional foam is expertly injected as needed, to create an even and level surface. Finally, the holes are patched, giving your slab a smooth surface.