Polyurethane concrete lifting — often called polyjacking or foam jacking — is the modern, engineered solution for raising sunken concrete around your Knoxville home or business. By injecting a high-density, closed-cell polymer foam through dime-sized holes, we restore your slabs to a safe, level position in a matter of hours, not days.
Knoxville Concrete Lifting has lifted thousands of square feet of driveways, sidewalks, patios, garage floors, and pool decks across Knox, Blount, and Sevier Counties. Polyurethane foam is lightweight, waterproof, and permanent — making it the right choice for East Tennessee's freeze-thaw cycles, expansive red clay, and heavy summer rains.
How Polyurethane Concrete Lifting Works
Our certified technicians drill 5/8" injection ports through the affected slab in a precise pattern engineered for your specific lift. A two-part polyurethane resin is then pumped beneath the concrete. Within seconds, the chemicals react and expand, filling voids, compacting loose soil, and raising the slab back to grade with millimeter-level accuracy.
Once the lift is complete, we patch the small injection holes with a color-matched cement compound. The slab is ready for foot traffic immediately and full vehicle loads within 15 minutes — a fraction of the downtime of replacement or traditional mudjacking.
Signs You Need Concrete Lifting in Knoxville
Sunken concrete isn't just an eyesore — it's a liability and a sign of deeper soil problems. Common warning signs we see across the Knoxville area include: trip hazards where slabs meet, water pooling on driveways or pool decks, gaps between your home's foundation and adjoining concrete, sloped garage floors that send rainwater inside, and pitched sidewalks that funnel water toward your foundation.
East Tennessee's clay soils swell when wet and shrink when dry, which causes the soil under concrete to wash out, compress, or develop voids. Polyjacking corrects all three by densifying the soil column underneath the slab.
Polyjacking vs Mudjacking vs Replacement
Polyurethane foam weighs roughly 4 pounds per cubic foot. Mudjacking slurry weighs around 100 pounds per cubic foot. That difference matters in Knoxville, where the same poor soils that caused your slab to sink can't support the additional weight of a mud slurry long-term.
Compared to tear-out and replacement, polyjacking saves 50–70% on cost, finishes in hours instead of days, and preserves the look of your existing concrete. There are no cure times, no fresh-pour cracking, and no curing weather concerns.
What Polyurethane Lifting Costs in the Knoxville Area
Most residential lifts in Knox, Blount, and Sevier Counties fall between $850 and $2,400 depending on slab size, lift height, void volume, and access. Driveways and pool decks tend to land in the middle of that range; sidewalk trip-hazard repairs are typically the most affordable. Every quote we provide is a flat price — no surprise charges for additional foam.
Why Homeowners Choose Knoxville Concrete Lifting
We're locally owned, fully insured, and use only commercial-grade polyurethane formulated for the freeze-thaw conditions of East Tennessee. Our lifts carry a written lifetime materials warranty against re-settlement of the lifted slab, and every job is performed by W-2 employees — never day labor.
Service Areas for Polyurethane Concrete Lifting
We provide polyurethane concrete lifting across every Knoxville neighborhood and throughout Blount and Sevier Counties. Popular service areas include:
- Polyurethane Lifting in Knoxville
- Polyurethane Lifting in West Knoxville
- Polyurethane Lifting in Farragut
- Polyurethane Lifting in Maryville
- Polyurethane Lifting in Alcoa
- Polyurethane Lifting in Sevierville
- Polyurethane Lifting in Pigeon Forge
- Polyurethane Lifting in Gatlinburg
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