Mudjacking / Slab Jacking
Worth asking about when the slab settled but is still mostly intact and usable.
Mudjacking vs Concrete Replacement
If your concrete has settled but still looks solid, mudjacking may be worth checking before you tear it out. If it is cracked up or crumbling, replacement may be the better conversation.
This guide is for homeowner planning and general education. Site conditions, slab access, and local contractor pricing can change project recommendations.
Decision Guide
Should you mudjack it or replace it?
This is one of the big questions homeowners run into after a driveway, sidewalk, patio, steps, or slab has moved. Do you lift what is there, or do you tear it out and start over?
Mudjacking may make sense when the concrete is still mostly solid but settled lower than it should. The slab needs support underneath, not a brand-new surface.
Replacement may make more sense when the concrete itself is failing. If it is broken into pieces, crumbling, heaved, or too thin to trust, lifting it may not be money well spent.
The goal is not to sell one answer. It is to help you ask the right question before spending real money.
The Basic Difference
Mudjacking lifts settled concrete. Replacement starts over.
One tries to save the existing slab. The other removes it and pours new concrete.
Mudjacking, or slab jacking, usually means drilling holes and pumping a cement-based slurry or grout under the slab. The material fills space and helps raise the concrete closer to where it belongs.
Replacement means demolition, hauling, base prep, forming, pouring, curing, and cleanup. It is a bigger job, but sometimes it is the honest answer.
Mudjacking may be faster, less disruptive, and less expensive when the slab is worth saving. Replacement may be better long term when the concrete is too damaged.
Concrete Replacement
Worth pricing when the slab is badly cracked, crumbling, heaved, thin, unstable, or broken into pieces.
Compare Both
Smart when the concrete is rough enough that lifting might work, but you do not want to guess.
When Mudjacking May Make Sense
When I would ask about mudjacking first
I would ask about mudjacking first when the slab is mostly intact, settled downward, and still has a usable surface. Think driveway lip, sidewalk trip edge, patio low spot, or step and stoop settlement.
Minor cracks do not automatically rule it out. The bigger question is whether the concrete is still one workable slab instead of a pile of broken pieces.
If you are trying to avoid tear-out and there is a reasonable repair option, slab jacking is worth understanding before you decide.
When Replacement May Be Better
When I would probably price replacement too
Replacement may be worth pricing when the concrete is badly cracked, broken into several pieces, crumbling, badly spalling, too thin, or unstable.
Tree roots that pushed a slab upward can also change the repair. So can severe water or base problems where the support underneath is gone.
If it just settled, mudjacking may be worth a look. If it is falling apart, that is a different conversation. In that middle ground, read the leveling vs replacement guide and compare both.
Cost
Which one costs less?
Mudjacking often costs less than replacement, but only when the slab is actually worth saving.
Mudjacking cost depends on slab size, amount of lift, voids underneath, access, material, and minimum setup charges. Replacement usually costs more because it adds tear-out and new concrete work.
But lifting a bad slab can be wasted money. If the surface is crumbling or the slab is broken up, the cheaper first number may not be the better decision.
If the concrete is borderline, use the concrete leveling cost guide as a starting point and ask for both options.
- Size of slab
- Amount of settlement
- Voids underneath
- Slab condition
- Access
- Drainage cause
- Mudjacking material/setup
- Replacement scope
What to Ask
Questions I would ask before choosing
- Is the slab still worth saving?
- Why did it sink?
- Are there voids underneath?
- Would mudjacking support it well?
- Is the concrete too cracked or crumbling?
- Would replacement solve anything mudjacking cannot?
- What would cause this repair to fail later?
FAQs
Mudjacking vs replacement questions
Is mudjacking cheaper than replacement?
Often, yes, when the slab is still worth saving. Replacement usually involves demolition, hauling, base prep, pouring, curing, and cleanup.
How do I know if my slab can be mudjacked?
A contractor needs to inspect it, but mostly intact concrete that settled downward is usually a better candidate than crumbling or broken concrete.
When should concrete be replaced instead?
Replacement is usually worth pricing when the slab is badly cracked, broken into pieces, unstable, root-heaved, or badly spalling.
Can cracked concrete be mudjacked?
Sometimes. A small crack does not automatically rule it out. A slab broken into several pieces is a different story.
Is mudjacking a permanent fix?
It can last when the slab is a good candidate and the cause is addressed. If water keeps washing out the base, problems can come back.
Should I get both quotes?
If the concrete is borderline, yes. I would rather compare both than guess.
Does mudjacking fix drainage problems?
It may help if lifting restores slope, but downspouts, grading, or water flow may still need attention.
Request a quote
Not sure if mudjacking or replacement makes more sense?
Tell us what sank, where you are located, and how soon you would like it looked at. A contractor serving your area can help compare whether mudjacking, foam lifting, or replacement is the better conversation.
Keep Comparing
Related Central Illinois pages
A few practical next pages if you are still sorting out what makes sense.
Can My Concrete Be Lifted?
Answer a few questions about the slab before requesting a quote.
Request Quote
Describe what is sinking and ask for someone serving your area.
Foam Lifting vs Mudjacking
Compare the two common lifting methods in plain English.
Concrete Crack Repair vs Leveling
Figure out whether a crack, settlement, or both are involved.
Why Concrete Sinks
Understand water, voids, base movement, roots, and age.
Concrete Leveling
Start with the broad idea of lifting and supporting settled concrete.
Mudjacking
Plain-English help for traditional slurry lifting.
Slab Jacking
Learn what slab jacking means and when it may fit.
Concrete Lifting
Understand concrete lifting for driveways, sidewalks, patios, and slabs.
Concrete Raising
Another common term for raising settled concrete.
Foam Concrete Lifting
See how polyurethane foam lifting compares.
Polyjacking
Learn the foam lifting method called polyjacking.
Sunken Driveway Repair
Options for driveway lips and uneven slabs.
Sidewalk Trip Hazard Repair
What to know about uneven sidewalk panels.
Sinking Patio Repair
Patio leveling options when slabs settle or hold water.
Concrete Steps Sinking
Porch step and stoop leveling questions.
Garage Floor Settling
Garage slab leveling and replacement considerations.
Springfield
Concrete leveling information for Springfield.
Bloomington-Normal
Concrete leveling information for Bloomington-Normal.
Decatur
Concrete leveling information for Decatur.
Champaign-Urbana
Concrete leveling information for Champaign-Urbana.
Peoria
Concrete leveling 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.