Service

Polyjacking & Polyurethane Foam Concrete Leveling in St. Joseph, MO

Polyjacking, foam jacking, poly leveling, polyurethane concrete lifting — same method, four names. A two-part resin is injected under the slab, expands, fills the void, and lifts the concrete back to grade.

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How foam leveling works

The crew drills ports about five-eighths of an inch across, roughly the size of a penny. A gun injects two liquid components that react and expand within seconds. The foam finds the void, fills it, then builds enough pressure to raise the slab. The operator watches the surface with a level and stops at grade.

Cured foam is light — a small fraction of the weight of a slurry fill — and it does not absorb water. On loess that has already lost volume once, not adding load is a real advantage.

When foam is the better choice here

Thin slabs, wide hollows, pool decks, sidewalks along a bluff-side lot, and any surface you need back in use the same afternoon. Foam cures in minutes, so a driveway can usually take traffic before the crew has finished loading up.

It also travels. Foam spreads through a void sideways better than slurry does, so it reaches the far corner of a hollow that a slurry pump would struggle to fill without a second hole pattern.

The honest trade-off

Foam costs more. National 2026 data puts it around $8–$25 per square foot against roughly $4–$9 for mudjacking. On a straightforward garage floor over solid ground, that premium buys you very little, and we will say so.

Cured polyurethane is inert and does not leach into the ground, which is why it is used near water lines and under roadways. That said, no method is a fix for a drainage problem. If a downspout is dumping against the slab edge, fix the water first or you will be back.

Questions

Foam Leveling (Polyjacking) questions

Is polyurethane foam safe for the soil?

Once cured, the foam is an inert closed-cell plastic. It does not dissolve, leach, or absorb groundwater, which is why the same material is used under roadways and near utility lines.

Is polyjacking the same as mudjacking?

Same goal, different material. Mudjacking pumps a heavy cement slurry; polyjacking injects a light expanding resin. Foam uses smaller holes and cures faster, and it costs more per square foot.

How long does foam leveling last?

The foam itself does not break down. Future movement comes from the ground around it, so lasting results depend on keeping water from running under the slab.

Related work

Most jobs touch more than one slab. If you are looking at mudjacking, patio & pool deck leveling, driveway leveling, we can quote them on the same visit.

We handle this service across the metro, including Savannah, MO, Country Club, MO, Elwood, KS.

Not sure which method your slab needs?

Send us what's sinking and we'll call you back with a plain answer and a written estimate before any work is booked.

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