Drilling a small injection port into a concrete slab with a rotary hammer drill -- PolyJacks concrete leveling serving Lawrence, KS.
Concrete Leveling · Lawrence, KS

Concrete Leveling in Lawrence, KS

Lawrence spreads across the Kansas River valley in Douglas County, from the flats near downtown up toward Mount Oread and the ridges around it.

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Quick answer

Concrete in Lawrence settles when the clay soil beneath it shrinks, swells, or washes out and leaves voids under the slab. Rather than replace it, PolyJacks injects waterproof polyurethane foam through small holes to fill those voids and raise the slab back to level, usually usable within hours and well under the cost of replacement.

With a mix of century-old neighborhoods and newer development pushing west, concrete settling shows up on streets built decades apart. PolyJacks provides concrete leveling in Lawrence with a free, honest estimate.

Local note: Lawrence sits where the Kansas River meets the Wakarusa River valley to the south, and that river-bottom ground behaves differently than the hillier streets up around downtown and the university. Douglas County stretches out to Eudora and Lecompton, with Tonganoxie, Baldwin City, De Soto and Edgerton all within a short drive, so we see settling patterns from river-valley lots all the way to acreages further out. Douglas County's USDA soil survey rates 51.3% of the county's mapped ground as High to Very-High shrink-swell clay, and Lawrence sits squarely in that footprint. Low ground near the Kansas River holds moisture and swells hardest after rain, older neighborhoods near downtown and KU have decades of freeze-thaw cycles working the same clay under their slabs, and newer construction farther from the river tends to settle instead because the fill dirt wasn't fully compacted before the concrete went in.
Cutaway diagram of a concrete slab sinking into a soil void, with foam injected through a small hole to lift it level

Why Concrete Sinks in Lawrence, KS

Lawrence's older neighborhoods near downtown and the University of Kansas have had decades for freeze-thaw cycles and clay soil movement to hollow out the ground under driveways, walkways and porches. Closer to the Kansas River, low-lying lots deal with soil that holds more moisture and shifts more with the seasons, which can accelerate settling under a patio or garage floor. Farther out in newer parts of town, the cause is often different - fill dirt that wasn't fully compacted before a driveway was poured, which settles unevenly as the ground adjusts over the first several years. Add poor drainage - downspouts or a sloped yard sending water straight at a foundation - and voids open up faster no matter which part of Lawrence you're in. A dipping slab, a step that's pulled away from your porch, or a driveway with a lip at the garage floor are all signs of a void underneath, not a defect in the concrete itself.

What We Level Around Lawrence

PolyJacks handles concrete leveling in Lawrence for driveways, sidewalks and walkways, patios, garage floors, pool decks, and porches and steps. Driveway leveling is one of our most common calls here, especially on older streets near downtown where decades of settling have left a noticeable dip or lip where the driveway meets the street or garage floor. We also fill voids under slabs that haven't visibly sunk yet - useful on properties near the river where soil moisture makes future settling more likely. Whether it's a cracked walkway on a shaded, century-old lot or a patio slab on a newer build west of town, the approach is the same: locate the voids, drill a few dime-sized holes, and inject polyurethane foam that expands to lift the concrete back toward level, without tearing anything out.

Polyjacking vs. Mudjacking for Lawrence Homeowners

Mudjacking has a long history in this part of Kansas, and plenty of Lawrence homeowners still ask for it by name even when they're really comparing options for concrete leveling. The difference comes down to the material and the holes. Mudjacking pumps a heavy cement-based slurry through much larger holes, and that weight can be a problem on the same soft, moisture-holding soil near the river that likely caused the settling in the first place. Polyurethane foam goes in through holes about the size of a dime, expands to fill the void, and cures in minutes rather than days. It's lightweight, so it won't overload weak ground, and it's waterproof, so it won't break down the way a mud slurry can over years of Kansas freeze-thaw cycles. For most Lawrence driveways and patios, that adds up to less mess and a faster return to normal use.

Concrete Leveling - How the Visit Goes

A concrete leveling visit in Lawrence starts with a free, on-site estimate - we look at the slab, figure out where the voids likely are, and give you a straight answer about whether foam is the right fix. How a polyjacking visit works →

Serving Lawrence and Douglas County

We cover all of Lawrence and the surrounding Douglas County towns, including Eudora and Lecompton close by, and Tonganoxie, Baldwin City, De Soto and Edgerton a little further out. If you're searching for concrete leveling near me anywhere along the Kansas River corridor between Topeka and Kansas City, there's a good chance we're already in your area. PolyJacks is based in Spring Hill and drives out to Lawrence regularly for driveway leveling, patio repair and void filling. Every job starts with the same free estimate, and if foam isn't the right call for your situation, we'll tell you that up front instead of pushing a fix you don't need.

What we level in Lawrence

Our concrete leveling services

Driveway Leveling

Lift a settled driveway

Sidewalk Leveling

Sidewalk leveling

Patio Leveling

Raise a sinking patio

Garage Floor Leveling

Level an uneven garage floor

Pool Deck Lifting

Lift a settled pool deck

Porch & Step Leveling

Porch and step leveling

Commercial Leveling

Level a commercial slab

Concrete leveling near Lawrence

PolyJacks is your local concrete leveling contractor in Lawrence — we serve Lawrence and the surrounding communities:

Neighborhoods across Lawrence:

Downtown LawrenceOld West LawrenceEast LawrenceUniversity of Kansas area (Mount Oread)
Our process, up close

Real job documentation

A concrete slab crack with a foam-injection hose and brass fitting alongside -- PolyJacks concrete leveling serving Leawood, KS.
A cracked slab documented during a job visit, with the injection hose staged beside it.
A coiled concrete-leveling injection hose on a residential concrete driveway -- PolyJacks concrete leveling serving Lenexa, KS.
Setting up on a driveway — the hose runs from the rig to the slab.
See it in action

How polyjacking works — 90 seconds

Our team walks you through the three-step process: dime-sized holes, high-density polyurethane foam that fills every void and compresses the soil beneath your slab, and use within hours with no heavy trucks. Call (913) 713-7794 or book a free estimate below.

Good questions

Frequently asked

How much does concrete leveling cost in Lawrence?

It varies by slab size and how much foam is needed, so we don't give a number sight unseen. Every estimate in Lawrence is free and comes with no obligation.

How long does the process take?

Most residential slabs are done in a single visit. You can walk on the concrete in about 15-30 minutes and drive on it in roughly 1-2 hours.

Is polyurethane foam leveling permanent?

The foam is waterproof and won't wash out like mudjacking slurry can. How long the lift holds depends on your soil and drainage, which we'll go over during your estimate.

Will the repaired concrete match the rest of my driveway or patio?

Yes - we lift your existing slab instead of pouring new concrete, so the color and finish stay the same.

Do you serve towns near Lawrence like Eudora or Baldwin City?

Yes, we regularly work throughout Douglas County, including Eudora, Lecompton, Tonganoxie, Baldwin City, De Soto and Edgerton.

Is there a concrete leveling company near me in Lawrence, KS?

PolyJacks covers Lawrence, KS. Count on 2–4 hours on site for most jobs, then you're back to using your concrete within hours — walk on it in 15–30 minutes, drive within 1–2 hours. The estimate is free. Book online.

Free concrete leveling estimate in Lawrence

No obligation — honest advice, usable within hours. If foam isn't the right fix, we'll tell you straight.

Ready when you are

Book your free estimate

Pick a time that works for you — free on-site inspection, no obligation. Prefer to talk? Call (913) 713-7794.

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