Concrete Lifting & Leveling in Knoxville, TN.
Polyurethane foam is injected beneath settled concrete to raise and support it.
High-density polyurethane foam expands into underground voids, consolidates loose subsoils, and lifts uneven slabs back to level grade within minutes—without ripping up your yard or waiting days for new concrete to cure.
Ready in 15–30 Mins
Quick polyurethane foam cure allows same-day driveway parking.
Penny-Sized 5/8" Holes
Tiny clean injection holes preserve concrete aesthetics.
Request Concrete Assessment
How Polyurethane Foam Lifts & Levels Concrete
Unlike messy mudjacking or costly concrete replacement, polyurethane foam injection is a non-invasive, quick-curing process that stabilizes loose subsoil and lifts sunken slabs back into place.
Step-by-Step Lifting Sequence
Penny-Sized Drill Holes
Step 1: PrepMinimal Surface Impact
Small, discreet 5/8-inch holes (about the size of a penny) are strategically drilled through the settled concrete slab. Unlike traditional mudjacking which requires large 2-3 inch holes, this preserves the visual integrity of your concrete.
Polyurethane Foam Injection
Step 2: Sub-Surface InjectionHigh-Density Polyurethane Foam
Controlled Precision Lift
Step 3: StabilizationMillimeter Accuracy
Patch & Immediate Ready Time
Step 4: Same-Day UseCures in 15–30 Minutes
Why Homeowners Choose Poly Foam Injection
Compare modern structural polyurethane foam lifting with older methods
Polyurethane Foam
High-density expanding structural foam injected under the slab.
- Tiny 5/8" holes: Almost invisible after patching
- Lightweight material: Adds only 2–4 lbs/cu.ft, won't overburden soil
- Fast cure: Usable in 15–30 minutes
- Water resistant: Will not wash away with East TN rain
Old Mudjacking
Heavy slurry of cement, mud, and water pumped beneath concrete.
- ✕Large holes: Requires 2" to 3" holes leaving obvious round scars
- ✕Extreme weight: Weighs 100+ lbs/cu.ft, often causing future settling
- ✕Slow drying: Takes 24–48 hours to dry
- ✕Washout prone: Susceptible to water erosion
Total Tear-Out & Repour
Demolishing the existing concrete and pouring new slabs.
- ✕Extremely expensive: Costs 2x to 4x more than lifting
- ✕Destructive: Heavy machinery tears up landscaping and lawns
- ✕Long downtime: Out of commission for 7 to 28 days
- ✕Mismatched color: New pour never matches aged adjacent slabs
Concrete Slabs We Raise & Level in Knoxville
Any poured concrete slab supported by settled East Tennessee clay or gravel sub-base can be stabilized and lifted with precision high-density polyurethane.
Driveway Leveling
Polyurethane Foam StabilizationEliminate uneven concrete joints, tripping hazards, and vehicle undercarriage scrapes.
- Protects tires & vehicle suspensions
- Ready for traffic shortly after injection
- Cost-effective alternative to driveway replacement
Sidewalks & Walkways
Polyurethane Foam StabilizationRestore trip-free pedestrian walkways for residential paths and commercial foot traffic.
- Immediate reduction of trip hazards
- Small penny-sized injection holes
- No lawn excavation or torn up turf
Patios, Porches & Pool Decks
Polyurethane Foam StabilizationFix sinking outdoor living slabs, pool surroundings, and stoops sloping toward foundations.
- Directs water runoff away from foundation
- Water-resistant, closed-cell expanding foam
- Gentle precision lifting on delicate tiles & slabs
Garage Floors & Interior Slabs
Polyurethane Foam StabilizationLift sunken garage pads, interior floor slabs, and transition lips back to level grade.
- Fills hollow voids underneath settling slabs
- Dense structural support
- Clean indoor-safe equipment and process
Why Prompt Slab Leveling Matters
Ignoring sunken concrete allows rainwater to erode deeper subsoil voids over time.
Trip Hazards & Liability
Uneven concrete joints on walkways and steps are a primary source of dangerous falls for family, visitors, or customers.
Foundation Water Drainage
Sunken slabs pitching toward your house direct rainwater against your foundation walls, risking basement and crawlspace leaks.
Fractions of Replacement Cost
Polyurethane foam lifting typically costs 50% to 70% less than tearing out and repouring concrete slabs.
Concrete Lifting Across Knox County & Surrounding Areas
Knox Lift and Level LLC is dedicated to restoring sunken concrete throughout the Knoxville metropolitan area and East Tennessee communities. Because our polyurethane equipment is self-contained and mobile, we bring high-density foam lifting directly to your home or commercial property.
Communities We Serve in East Tennessee:
*Not sure if your specific address falls in our radius? Request a free estimate with your ZIP code and we'll confirm service availability.
Knoxville, TN Headquarters
Full mobile polyurethane rigs dispatching across East TN
Frequently Asked Questions
Everything you need to know about polyurethane foam slab stabilization in Knoxville.
Ready to Level Your Sunken Concrete?
Don't replace settled slabs when high-density polyurethane foam can raise them back flush for a fraction of the cost. Get a free, zero-obligation estimate for your driveway, sidewalk, patio, or garage floor today.
Self-contained mobile equipment without heavy excavation machinery tearing your yard.
Walk or park on your concrete within 15–30 minutes of foam cure.