Kansas City Concrete Leveling — Sunken Slabs Lifted, Not Replaced
KC's shrink-swell clay soil sinks concrete. PolyJacks raises sunken driveways, sidewalks, patios and pool decks with waterproof polyurethane foam — most jobs take 2–4 hours and you're driving on it within hours, anywhere in the Kansas City metro.
How polyjacking works in 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.
Concrete leveling raises a sunken slab back into place instead of replacing it. PolyJacks injects expanding waterproof polyurethane foam through dime-sized holes to fill the voids underneath, lifting driveways, sidewalks, patios and garage floors across the Kansas City metro. Most jobs finish in 2-4 hours, are usable within hours, and cost far less than replacement.
Concrete leveling across the KC metro
Intact but sunken? We can almost always raise it instead of replacing it.
Driveway Leveling
Raise a sunken driveway (or a slab that's dropped at the garage) back to level in a few hours, no tear-out.
Level your driveway slabSidewalk Leveling
Kill trip hazards and even out uneven walks and paths: safer footing, less liability.
Level a settled sidewalkPatio Leveling
Re-level a patio that's settled, split at the seams, or pools water after every rain.
Patio levelingGarage Floor Leveling
Lift a settled garage floor slab back to even, without jackhammering it out.
Raise a sunken garage floorPool Deck Lifting
Raise a sunken pool deck back to level without draining the pool. Foam won't wash out.
Level an uneven pool deckPorch & Step Leveling
Bring settled porches, stoops, and concrete steps back to safe, even height.
Lift a settled porchHow polyjacking works
A handful of dime-sized holes, expanding foam, and your slab back to level. In hours, not days.
Assess & Mark
We find the voids and mark discreet injection points.
Drill Small Holes
Dime-sized holes, far smaller than mudjacking's.
Inject the Foam
Waterproof polyurethane expands, fills the void, and lifts.
Lift & Use in Hours
Cured in minutes. Walk it in 15–30, drive in 1–2 hours.
On-site visit. No charge, no obligation.
FREEFrom your field specialist. Exact scope, exact price.
NO HIDDEN FEESMost jobs: 2–4 hours. Walk on it in 15–30 minutes.
USABLE IN HOURSSee how it works: a quick animation of the foam injection process:
We lift your slab from underneath. In hours, not days
A dime-sized hole. Waterproof foam. Your concrete rises back to level.
- 1. Drill dime-sized holes
- 2. Inject expanding foam
- 3. Slab lifts back to level
Level. Done. In Hours.
2–4 HOURS · WALK ON IT IN 30 MIN · WATERPROOF FOAM
The foam is lightweight. It re-supports your slab without overloading the soil, and it’s waterproof, so it won’t wash out like mudjacking.
Foam beats mudjacking and replacement
| PolyJacks foam | Mudjacking | Replacement | |
|---|---|---|---|
| Back in use | 2–4 hrs | 24–72 hrs | Up to ~1 month |
| Weight on soil | Featherlight | Heavy slurry | New slab load |
| Injection holes | Dime-sized | Much larger | Full demo |
| Waterproof | Yes, won't wash out | No | — |
| Cost vs replacement | Far less | Less, shorter-lived | Most expensive |
Why Kansas City concrete sinks
The KC metro sits on the Wymore-Ladoga clay complex, a soil that swells when it gets wet and shrinks when it dries.
Every freeze forces water into micro-cracks and expands it. Every thaw leaves tiny voids behind. Heavy springs and dry late summers keep that shrink-swell cycle working at the soil under your slabs all year long.
See how your county ranks in our KC Concrete Settlement Risk Index: soil, freeze-thaw and 311 data, every figure sourced.
Driveways, sidewalks and patios feel it first. They sit on compacted fill, without the deep frost-protected footings a foundation gets. Once a void opens under a panel, the panel sinks.
Polyjacking, also called concrete jacking, slab jacking or cement leveling, fills those voids with expanding waterproof foam and lifts the slab back to grade in hours. Often in a single visit.
Not sure what's wrong?
Four quick taps. We'll tell you the likely cause, how urgent it is, and whether foam is even the right fix.
What neighbors say
Homeowners across the metro share their experience.
"Our driveway had a big drop at the garage. They lifted it in one morning and you can't even tell where the holes were."
"Honest and fast. Quoted me free, showed up on time, and the sidewalk trip hazard is gone. Done in one visit, just like they said."
"Saved us from replacing the whole patio. Fraction of the hassle and it's perfectly level now."
Summer-dry clay is opening voids under your slabs
As the ground dries through a Kansas City summer, our 60-to-80%-clay soil contracts and pulls away from the underside of your concrete, opening the voids a slab eventually sinks into. Dry ground also means clean, easy access for a lift.
How KC clay soil moves concrete →Learn before you level
Does Concrete Leveling Really Work?
Read the guideWhy Your Driveway Is Pulling Away From the Garage (And How to Fix It)
Read the guideHow Kansas City Clay Soil Quietly Wrecks Your Concrete
Read the guideHow Long Does Concrete Leveling Last?
Read the guideFrequently asked
Will my concrete sink again after polyjacking?
Not from the foam itself. It doesn't shrink, break down, or wash out once it cures. A lift only gives way if the original cause is still active underneath: a leaking pipe washing soil out, or drainage still funneling water beneath the slab. Handle that and the lift holds for good, which is why we flag any active drainage or grading issue on the estimate. And if a slab we lifted settles more than 1/4 inch within a year due to our work, we come back and re-lift it free under warranty.
How soon can I use my driveway or walkway after leveling?
The foam sets up firm enough to walk on in 15 to 30 minutes and handle regular vehicle traffic in 1 to 2 hours. We just ask you hold off on anything heavy (trucks, RVs, trailers, dumpsters) for 48 hours while it reaches full cure.
How long does polyjacked concrete last?
Indefinitely, in most cases. The foam itself doesn't shrink, wash out, or break down over time. How long the lift holds depends on what's happening underneath: if erosion, poor drainage, or root growth caused the original sinking and that keeps going, the ground can still move. That's why we look at the whole picture during your free estimate, not just the slab on top.
Why does concrete sink and crack so much around Kansas City?
Two things working against you here. Our clay soil swells when it's wet and shrinks when it dries out, so it's constantly moving under your slab. Then add repeated freeze-thaw cycles most winters and that ground never really settles. On top of that you've got the usual culprits: drainage washout, downspouts dumping water next to the slab, poor fill compaction under newer concrete, tree roots, and voids that form underneath over the years. Most jobs are a mix of two or three of these.
How big are the injection holes, and will they show?
About the size of a dime. A typical job needs 4 to 12 holes depending on the size of the slab and how many low spots we're filling. We patch every hole with a color-matched concrete cap before we leave, so from a few feet back most people can't tell where we worked.
Is polyjacking messy? Will it tear up my yard?
No digging, no jackhammering, no dump truck hauling off broken concrete. We drill small holes, pump foam through them, and patch. Most jobs wrap up in 2 to 4 hours in a small work area around the slab. Compare that to a mudjacking crew running slurry or a replacement crew tearing out and repouring, and it's a different level of mess. We clean up before we go.
Get your free concrete leveling estimate
No obligation, no pressure. And if foam isn't the right fix, we'll tell you straight.
Book your free estimate
Pick a time that works for you. Free on-site inspection, no obligation. Prefer to talk? Call (913) 713-7794.