Driveway slabs
Especially settled slabs near the garage, street, or expansion joints.
Slab Jacking in Central Illinois
Slab jacking is a common term for lifting settled concrete instead of tearing it out. If the slab is still worth saving, it may be worth asking about.
This guide is for homeowner planning and general education. Site conditions, slab access, and local contractor pricing can change project recommendations.
Slab jacking sounds fancy, but the basic idea is pretty simple: lift a settled concrete slab by pumping material underneath it until it has support again.
Homeowners searching for slab jacking may also run into mudjacking, concrete lifting, concrete raising, foam lifting, and polyjacking. The terms overlap, but the material and method can be different.
This is one of the main repair terms worth learning if you have a driveway slab, sidewalk panel, patio, step, garage slab, or pool deck that settled but still looks usable.
What It Means
What does slab jacking actually do?
Slab jacking is about lifting and supporting concrete that settled. It does not make old concrete new, and it does not magically fix every crack. It addresses the position and support of the slab.
That matters when a slab dropped because of voids, washout, base movement, poor compaction, or water getting where it should not. If the concrete is still mostly intact, lifting may be a reasonable question.
If the slab is broken apart or crumbling, the question changes from "can it be lifted?" to "is this worth saving?"
Where It May Help
Common slab jacking projects
Sidewalk panels
Dropped panels that create a trip edge may be worth checking.
Patio slabs
Patios that settle, hold water, or pull away from the house.
Front steps and stoops
Entry areas where a small change makes every step feel wrong.
Garage slabs
Garage floors need careful inspection because access and cracking matter.
Pool decks
Uneven concrete around a pool should be looked at for safety and drainage.
Commercial walkways
Settled walkways can become trip hazards and daily nuisances.
Slabs with voids underneath
If there is empty space under the slab, support underneath may be the main issue.
Is slab jacking the same as mudjacking?
In everyday homeowner searches, people often use slab jacking and mudjacking almost the same way. Both usually mean lifting a settled slab by pumping material underneath it.
The important question is what material the contractor is using. Traditional mudjacking usually means a slurry or grout. Foam lifting or polyjacking uses expanding polyurethane foam. If you are comparing those methods, read the mudjacking vs polyjacking guide.
Also ask why the slab sank, whether there are voids, and what the repair should cost. The cost guide helps with that part.
When It May Work
When I'd ask about slab jacking
I would ask about slab jacking when the concrete is mostly intact, visibly settled, and still useful. A trip hazard, water pooling, driveway lip, sunken patio, or void under the slab can all be reasons to get an opinion.
Garage slabs, pool decks, and step areas deserve a closer look because they can be more complicated, but complicated does not automatically mean impossible.
When It May Not
When slab jacking may not be enough
If the concrete is broken into several pieces, crumbling badly, too thin, unstable, or heaved up by roots, slab jacking may not be money well spent.
Severe water or base problems can also make lifting less straightforward. This is where the leveling vs replacement comparison matters. The goal is the right repair, not just saving the old slab at all costs.
Cost
What affects slab jacking cost?
Slab jacking cost depends on the actual slab. Size, settlement, voids, material, access, drainage, and condition all matter. A small sidewalk panel is a different project than a garage slab or multi-panel driveway.
For the plain-English version of pricing factors, see the concrete leveling cost guide.
- Size of slab
- More concrete usually means more setup, time, and material.
- Amount of settlement
- The farther it dropped, the more careful the lift may need to be.
- Voids underneath
- Unsupported space under the slab can affect material needs.
- Material used
- Slurry, grout, and foam can price differently.
- Access
- Back patios, garages, and tight side yards can change the work.
- Slab condition
- The slab still needs to be worth saving.
- Drainage issue
- Water problems may need to be handled so settlement does not keep repeating.
- Replacement comparison
- Rough concrete should usually be compared against replacement.
Before saying yes, ask what material is being pumped underneath, why the slab sank, whether there are voids, whether drainage needs attention, and whether the slab is still worth saving.
If the concrete is cracked, ask whether the crack changes the recommendation. If the slab is rough, ask whether replacement should be priced too. A good answer should make sense in plain English, not just sound technical.
When you are ready, you can request a quote and send the basic details.
Slab Jacking FAQs
Slab jacking questions
What is slab jacking?
Slab jacking means lifting settled concrete by placing material underneath the slab to raise and support it.
Is slab jacking the same as mudjacking?
Often, yes in everyday language. Mudjacking is usually a form of slab jacking using slurry or grout.
Can slab jacking use foam?
Yes, some contractors use expanding polyurethane foam for concrete lifting. That is often called foam lifting or polyjacking.
How much does slab jacking cost?
It depends on slab size, settlement, voids, access, material, and condition. A real quote needs project details.
How long does slab jacking last?
It depends on the slab, base, drainage, and workmanship. If water keeps washing out the base, any repair can have trouble later.
Can a cracked slab be jacked?
Maybe. A small crack is not always a dealbreaker. A slab broken into several pieces may need replacement.
When should I skip slab jacking?
If the concrete is crumbling, unstable, root-heaved, or too damaged to support well, replacement may be the smarter conversation.
Request a Quote
Want to know if slab jacking makes sense?
Tell us what slab is sinking, where you're located, and how soon you'd like it looked at. Photos can help once someone reviews it, but they are not required just to start.
Keep Comparing
Related Central Illinois pages
A few practical next pages if you are still sorting out what makes sense.
Concrete Leveling Cost
Understand the main factors that move a quote up or down.
Mudjacking vs Polyjacking
Compare slurry lifting and foam lifting in plain English.
Foam Lifting vs Mudjacking
Compare foam lifting and slurry lifting without the sales fog.
Mudjacking vs Concrete Replacement
Know when mudjacking may fit and when replacement should be priced.
Concrete Leveling vs Replacement
Know when lifting may work and when replacement may be smarter.
Concrete Crack Repair vs Leveling
Sort out whether the crack or the settlement is the bigger issue.
Can My Concrete Be Lifted?
Use the quick quiz if you are not sure whether lifting is worth asking about.
Sunken Driveway Repair
Options for driveway lips, uneven slabs, and pooling water.
Sidewalk Trip Hazard Repair
What to know about uneven sidewalk panels and trip edges.
Sinking Patio Repair
Patio leveling options when slabs settle or hold water.
Void Under Concrete Slab
What to know when you can see empty space under a slab.
Springfield
Concrete leveling information for Springfield homeowners.
Bloomington-Normal
Concrete lifting guidance for Bloomington and Normal.
Decatur
Mudjacking and slab jacking information for Decatur.
Champaign-Urbana
Concrete repair planning around Champaign and Urbana.
Peoria
Sunken concrete repair information for Peoria.
Next step
Need someone to look at your sunken concrete?
Tell us what is sinking, where you are located, and how soon you would like it looked at. Photos are helpful later, but they are not required to start.