Polyjacking: Leveling Uneven Concrete With Lightweight Foam

Both methods level a settled slab by filling the voids underneath it, but they use different materials. Mud jacking pumps a heavy cement-based slurry through larger holes. Polyjacking injects a lightweight expanding polyurethane foam through smaller holes, cures faster, and adds far less weight to the soil. Neither method is automatically better. During your no-pressure inspection we explain which approach fits your slab and the soil beneath it, and why.

In many cases, yes. When a slab section or a sidewalk panel settles and leaves a raised lip at the joint, polyjacking can raise the low side back toward level, which removes the step that catches feet. It is commonly used on driveways, walkways, patios, porch slabs, and garage floors. Whether it is the right fit depends on the condition of the specific slab and what caused the settlement, which is what we confirm during the inspection.

One of the advantages of polyurethane foam is that it cures quickly. In most cases the slab can bear weight again within about fifteen minutes of the lift, which means a driveway, sidewalk, or patio is usable the same day. The exact timing depends on the slab and the conditions, and we will let you know what to expect for your specific project during the inspection.

It can be, because polyurethane foam is much lighter than a cement slurry and adds very little load to ground that may already be loose. That said, foam fills voids and supports the slab; it does not change the deeper soil behavior or drainage conditions that loosened the ground to begin with. In Sandhills sand or saturated coastal soils near Wilmington and Brunswick County, we assess whether foam alone will hold or whether the cause needs correcting too, and we recommend accordingly.

Cost depends on the size of the slab, how far it has settled, the number of injection points needed, access to the area, the soil conditions, and whether any drainage or soil correction is recommended alongside the lift. Because those factors vary from one slab to the next, we provide pricing after a no-pressure inspection rather than a flat number online. The inspection is how we give you an accurate, honest quote for your specific situation.

Not by itself. Polyjacking lifts the slab and fills the void beneath it, but it does not change deeper soil behavior or drainage problems that caused the settlement. If the cause is something like water draining against the slab or unstable subgrade, we address that as part of the recommendation, sometimes with grading or drainage corrections and sometimes with a deeper structural solution, so the lift is more likely to hold.

Let's take the first step toward a healthy home.

A local specialist will inspect your foundation, walk you through the findings, and send a clear estimate. no cost, no pressure.