Concrete leveling lifts sunken driveways, sidewalks, and patios back to their original height by injecting expanding polyurethane foam through penny-sized holes — no demolition, no new pour. Heartland Foundation Repair of Kansas City has been lifting and leveling concrete across the KC metro for 40+ years, and most jobs are done in one day for typically less than half the cost of replacement.

Concrete Leveling in Kansas City — Lift Sunken Slabs in One Day

Last updated June 2026

If you've been searching for concrete leveling near you in the Kansas City area, here's the short version: that sunken driveway slab, tilted sidewalk panel, or sagging patio almost never needs to be torn out. Polyurethane concrete lifting raises the existing slab back to level in hours, and the surface is ready to use the same day. We've used this method on homes from Johnson County to Liberty to Lee's Summit, and it's the same technology we use for concrete lifting under settling foundation slabs.

How Polyurethane Concrete Leveling Works

We drill penny-sized holes in the sunken slab, inject expanding polyurethane foam underneath, and the slab rises back to level — the foam reaches about 90% of its full compressive strength within 15 minutes, so the surface is back in service the same day.

Here's the full process. The equipment stays in a trailer rig at the street, with a long hose run directly to the slab — no heavy machinery on your lawn. Injection holes are strategically drilled into the concrete that needs lifting. Polyurethane foam is then injected under the slab, where it expands to fill every void and crack before raising the concrete to the correct level. Because the foam flows freely into voids and then expands to a high in-place density, it creates a solid, monolithic base that doesn't shift or settle afterward.

After the lift is complete, each hole is patched with polymer concrete or cement. The injection work itself typically takes 1-2 hours depending on the scope of the project, and most jobs — drilling, lifting, patching, cleanup — are finished in a single day. The foam is moisture-tolerant, so it can be injected even in wet conditions, and its high-density, closed-cell structure resists water penetration permanently.

Concrete Leveling vs. Mudjacking

Polyurethane concrete leveling achieves the same lift as traditional mudjacking but with a lightweight foam injected through far smaller and fewer holes — and it cures in minutes instead of days. That's why foam lifting has largely replaced mudjacking as the modern standard for concrete raising.

• Hole size — Foam jacking needs penny-sized holes. Mudjacking requires holes roughly the size of a soda can, which are far more visible after patching.
• Weight — Mud slurry adds hundreds of pounds on top of soil that was already too weak to hold the slab. Polyurethane foam weighs a fraction as much, so it lifts without adding load that can cause new settlement.
• Cure time — Mudjacking material can take a day or more to harden. Foam reaches about 90% of full strength in 15 minutes.
• Longevity — Mud slurry can erode and wash out over time, which is why mudjacked slabs often sink again. Closed-cell polyurethane is waterproof and doesn't break down.
• Crew and disruption — Foam lifting is typically done by a two-man crew with a hose, which means less time on site and lower overall job costs.

Concrete Leveling vs. Replacement

Concrete leveling typically costs less than half the price of tearing out and repouring the same slab — and you skip the demolition, the hauling, the damaged landscaping, and the weeks of waiting for new concrete to cure.

The real savings go beyond the pour itself. Replacement means jackhammers, dumpsters, concrete trucks across your yard, and a slab you can't touch for days while it cures — plus the new concrete often won't match the color of the surrounding panels. Lifting the existing slab avoids all of it: the surrounding area stays in use during the project, the original concrete stays in place, and the surface is ready the same day. Replacement only makes sense when a slab is severely cracked or crumbling — and if that's what we find, we'll tell you so at the inspection.

What We Can Lift and Level

Almost any settled slab-on-grade concrete can be lifted: driveways, sidewalks, patios, garage floors, pool decks, porches, and steps.

• Driveways — sunken panels at the garage apron or street, and slabs tilting toward the house and draining water at the foundation
• Sidewalks and walkways — raised or dropped panels that create trip hazards along the path
• Patios — slabs that have settled away from the house or pooled water against the back wall
• Garage and basement floors — interior slabs with voids or settlement underneath
• Pool decks — uneven panels around the water line
• Porches and steps — front stoops and step slabs that have pulled away or sunk

The same injection method also handles slab stabilization and void filling — locking a slab in place before it sinks further, even when a full lift isn't needed. You can read more about the foam itself on our polyurethane concrete leveling page.

Why Concrete Sinks in Kansas City

Kansas City slabs sink because they sit on expansive clay that swells when wet and shrinks when dry, compounded by soil washout from poor drainage and 100+ freeze-thaw cycles every winter. When the soil under a slab moves or erodes, a void forms — and the concrete settles into the empty space.

The metro's heavy clay is the same soil that causes most foundation problems here. Downspouts dumping water next to a driveway, a spring storm dropping several inches of rain, or a summer drought baking the clay can all open voids under your concrete. Poorly compacted fill from original construction is another common cause, especially under garage floors and porches. And if a sinking slab is showing up alongside cracks in your basement walls or doors that won't close, the slab may be the symptom of a larger settlement issue — that's when it's worth having our foundation repair team look at the whole picture during the same free inspection.

Before and After Concrete Leveling

The result of a good lift is simple: the slab returns to its original height, the trip hazard is gone, and water drains away from the house instead of toward it. Here's a typical before and after from a Kansas City concrete leveling project.

Before: settled slab with a visible drop-off and trip hazard

After: the same slab lifted back to level and ready for use the same day

Frequently Asked Questions

Get a Free Concrete Leveling Inspection

Heartland Foundation Repair of Kansas City has been lifting concrete and fixing foundations in this metro for over 40 years. We'll come out, measure the settlement, check for voids, and hand you a written estimate the same day — free, no pressure, no obligation. Call us at (913) 270-0250, request a free quote online, or contact us with any questions.