Concrete Lifting & Polyjacking FAQ
Kansas City Concrete Lifting Questions, Answered Straight
The most common questions we get about polyjacking, polyurethane concrete lifting, and concrete leveling — answered without marketing fluff.
About This FAQ
What's On This Page
This FAQ covers six categories of questions: general concrete lifting basics, polyjacking method specifics, cost and value, suitability and limitations, application-specific questions, and process and scheduling.
KC MudJack specializes exclusively in polyurethane-based concrete lifting systems, the modern alternative to traditional mudjacking. If your question isn’t here, send it to us — we’ll add it.
Six Categories
Method, cost, suitability, applications, process, value.
Honest Answers
No marketing fluff.
Updated Often
As we get new questions from customers.
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.
Most Common Questions
Quick Reference Across Categories
What is polyjacking?
Modern concrete lifting method using polyurethane foam injected beneath sunken slabs.
How much does it cost?
$700–$3,000+ in Kansas City. Most residential projects $1,000–$2,200.
How fast is it?
15–30 minutes back to use after the lift completes.
Do you offer mudjacking?
No. Polyurethane only — better long-term performance in Kansas City clay.
How Polyjacking Works
Why Polyurethane Foam Is Often Preferred
Small injection ports (about 5/8″) are drilled through the concrete at engineered locations. Two-part polyurethane foam is injected beneath the slab. As the foam expands, it fills voids, displaces moisture, densifies loose subgrade, and lifts the slab to the desired elevation.
Polyjacking provides long-term stabilization. The foam doesn’t wash out, absorb water, or degrade in soil — making it more durable than cement-based lifting methods.
Cost & Value
What KC MudJack Polyjacking Typically Runs
Polyjacking typically costs $700–$3,000+, depending on slab size, settlement depth, and access. Most residential projects fall between $1,000 and $2,200.
Replacement runs $4,000–$12,000+ once you factor in demolition, disposal, formwork, and pouring. Polyjacking is almost always significantly cheaper.
Process & Scheduling
How Long-Term Slab Support Works
Most residential projects are completed in 1–3 hours. Concrete is usable within 15–30 minutes. Injection holes are small, work areas are contained, and cleanup is minimal.
We serve Kansas City and surrounding communities within approximately 90 minutes, including Overland Park, Olathe, Lee’s Summit, Independence, Leawood, Blue Springs, Parkville, Belton, and beyond.
Frequently Asked Questions
Specific answers across cost, method, suitability, and process.
- 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
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Suitability & Limitations
When Polyjacking Is the Right Fit
Structurally Sound
Polyjacking works on slabs that are intact but settled. If the concrete itself is failed or shattered, replacement is the better call — we’ll say so.
Soil Voids Present
Hollow-sounding concrete, drainage issues, or visible separation often signal void spaces under the slab. Foam fills them and locks the slab in place.
Need Same-Day Use
If a slab has to be usable today, polyjacking beats mudjacking and replacement by hours or days. Standard turnaround.
Avoiding Replacement
Replacement runs 4–10× the cost of lifting and takes weeks. If the slab is salvageable, polyjacking is almost always the right starting point.
Free Polyjacking Inspection
Most questions get a clearer answer once we’ve seen the slab. About 20 minutes on-site.
Related Kansas City Concrete Lifting Guides
Related Resources
Polyjacking is a modern concrete lifting method that uses high-density expanding polyurethane foam injected beneath concrete slabs to raise, level, and stabilize them.
No. Mudjacking uses a heavy cement-based slurry to lift concrete; polyjacking uses lightweight polyurethane foam. Polyjacking offers faster cure times, better moisture resistance, and improved long-term stability.
Polyjacking typically costs $700–$3,000+, depending on slab size, settlement depth, and access. Most residential projects fall between $1,000 and $2,200.
Yes — usually significantly cheaper. Replacement runs $4,000–$12,000+ once you factor in demolition, disposal, formwork, and pouring.
Most polyjacking projects are ready for use within 15–30 minutes after completion.
Yes. Polyurethane foam is especially effective in expansive clay soils like those throughout the Kansas City region.
No. KC MudJack does not offer traditional mudjacking. We specialize exclusively in polyurethane concrete lifting because it consistently outperforms cement-based methods in Kansas City soil conditions.