Concrete Lifting Problems
Sunken Slabs, Trip Hazards, and Voids — All Fixed With Polyjacking
Most concrete problems in Kansas City share a single root cause: soil movement beneath the slab. The fix is polyurethane concrete lifting.
What We Fix
Common Concrete Settlement Issues
Sunken driveways. Uneven sidewalks. Trip hazards at doorways. Garage floors leaning toward the door. The symptoms vary, but the underlying cause is usually the same: voids and soil movement beneath the slab.
KC MudJack fixes these problems with polyurethane concrete lifting. Below is a guide to the most common settlement problems we see and the dedicated pages for each.
Same Root Cause
Soil voids and settlement beneath the slab.
Same Solution
Polyurethane foam injection.
Same Outcome
Slab restored to grade, no demolition.
15–30 Min
Same-hour use after the lift.
1/10th Weight
Far lighter than cement slurry.
5/8" Ports
Small holes, patched flush.
Long-Term
Outlasts cement-based lifting in clay.
Major Problem Categories
What We Fix Most Often
Sunken Driveways
Driveways pitching toward the house, dropping at the apron, settling toward the garage. Typical $1,000–$2,200.
Uneven Sidewalks
Trip hazards from settled panels eliminated with precise lifts. Typical $700–$1,000 per panel.
Garage Floor Settlement
Slabs leaning toward the door, often from foundation backfill. Typical $1,200–$2,500.
Voids Under Concrete
The underlying cause. Polyurethane foam fills voids and stabilizes the soil.
Other Problems We Fix
Lighter Material, Faster Cure, Better Long-Term Support
Beyond the four major categories, polyjacking also addresses patio and porch settlement, pool deck settlement, walkway settlement, step or stoop settlement.
We also handle industrial and commercial slab settlement — warehouse floors, loading docks, parking aprons. If you’re not sure which category your problem falls into, an on-site inspection sorts it out quickly.
When Polyjacking Is the Answer
Most Settlement Problems Are Lifting Candidates
Polyjacking is the right fix when the slab is structurally sound, the settlement is caused by soil voids or poor compaction, you want a faster less disruptive alternative to replacement, and long-term stability matters.
That’s the majority of residential cases we see across the metro.
When Replacement Is Right
Long-Term Support Starts with Void Fill and Proper Lift
Replacement is the right call when the slab is severely fractured or deteriorated, the concrete itself has failed structurally, or lifting won’t restore the slab’s load-bearing capacity.
We’ll tell you straight at the inspection if your slab falls in this category.
Concrete Problem FAQs
The most common questions about concrete settlement problems in Kansas City.
- Lightweight material that will not overload weak soils
- Fast cure times, often usable in 15 to 30 minutes
- High lift precision for cleaner leveling results
- Moisture-resistant support for long-term performance
Dedicated Solution Pages
Detailed Pages by Problem Type
Sunken Driveway
Settlement from clay shrinkage, erosion, or poor backfill compaction. We lift the slab back to grade and stabilize the soil underneath.
Uneven Sidewalk
Panels lifted, tilted, or dropped by tree roots, freeze-thaw, or drainage washout — re-leveled in one visit with no panel replacement.
Trip Hazards
Sidewalk or entry-pad lips over 1/4 inch — ADA-flagged and dangerous. Polyjacking removes them precisely without grinding or jackhammering.
Garage Floor
Interior slabs that have settled away from the foundation. Lifted from inside without removing anything you’ve stored on top.
Free Inspection — We'll Identify the Problem and the Fix
If you have settled concrete, the fastest way to know exactly what’s happening and what it’ll take to fix is an on-site inspection. About 20 minutes, no pressure.
Related Problem Pages
Solution Pages
Yes — about 85% of slabs we inspect are good polyjacking candidates. The remaining 15% need replacement, usually because the concrete itself has failed.
Polyjacking uses lightweight polyurethane foam. Mudjacking uses heavy cement-based slurry. We install polyurethane only.
Yes. Polyurethane lifting works for warehouses, loading docks, parking aprons, and municipal applications.
Sunken or sloping slabs, hollow sound when tapping, cracking patterns following void edges, water pooling in newly-low areas. See our Voids Under Concrete page for details.