Mudjacking
Raise Settled Concrete by Restoring Support Beneath the Slab
Get a repair-first evaluation of the damage, the surrounding concrete, and the conditions that may be causing it.
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Concrete slabs can sink even when the concrete itself still has useful life.
A driveway may settle near the garage.
A sidewalk panel may drop.
A patio may tilt.
A walkway may become uneven.
When settlement is the primary problem, mudjacking may be one method used to raise the slab and restore support beneath it.
Concrete Repair Pros provides mudjacking evaluations in Cedar Rapids, Iowa City, and surrounding communities, helping homeowners and property owners determine whether mudjacking makes sense for their concrete or whether another lifting method would be more appropriate.
The important question is not simply:
Can the slab be mudjacked?
It is:
Is mudjacking the right lifting method for this slab, this amount of settlement, and these site conditions?
What Is Mudjacking?
Mudjacking is a concrete lifting method used to raise settled slabs.
The process generally involves introducing a pumpable material beneath the concrete.
That material fills voids and creates pressure beneath the slab.
As support is restored, the slab can be raised toward a better elevation.
Mudjacking may also be called:
- Slabjacking
- Slab jacking
- Concrete slab jacking
- Concrete raising
- Concrete lifting
How Mudjacking Works
Mudjacking is based on a simple idea:
If a concrete slab sinks because support beneath it has been lost, adding material beneath the slab may help restore that support and raise the concrete.
A typical mudjacking process may involve:
- 1. Inspecting the slab
- 2. Identifying settled areas
- 3. Determining likely void locations
- 4. Drilling access holes
- 5. Pumping material beneath the slab
- 6. Raising the slab gradually
- 7. Checking elevation and drainage
- 8. Patching the access holes
The amount of lift needs to be controlled.
The goal is not simply to force the slab upward.
It is to improve the slab's position while avoiding unnecessary stress.
Why Concrete Sinks Before Mudjacking Is Needed
Mudjacking addresses the effect of lost support.
Understanding why the support was lost is just as important.
Soil Settlement
Soil can compress over time.
If the base beneath a slab settles, the concrete may drop with it.
Poorly Compacted Fill
Concrete placed over insufficiently compacted fill may settle after the soil beneath it continues compressing.
Erosion
Water can move soil away from beneath concrete.
This may leave voids.
Without consistent support, the slab may begin settling.
Drainage Problems
Water around a slab can contribute to:
- Erosion
- Softened soil
- Washout
- Base movement
- Repeated settlement
Possible sources include:
- Downspouts
- Poor grading
- Surface runoff
- Water entering slab joints
- Low areas
Utility Excavation
Concrete near previously excavated soil may settle as backfill compresses.
This may occur near:
- Utility trenches
- Water lines
- Sewer lines
- Drainage systems
- Electrical work
Freeze-Thaw Movement
Iowa's climate creates repeated freezing and thawing cycles.
Moisture and soil movement beneath exterior concrete can contribute to settlement over time.
What Types of Concrete Can Be Mudjacked?
Mudjacking may be considered for several types of settled flatwork.
Driveways
Settled driveway slabs may sometimes be mudjacked.
Common problem areas include:
- Garage approaches
- Driveway joints
- Low corners
- Slabs near sidewalks
- Sections affected by drainage
Driveway-specific repair intent belongs to our Sunken & Uneven Driveway Repair page.
Sidewalks
Mudjacking may be used to raise certain sunken sidewalk slabs.
Sidewalk-specific leveling and settlement intent belongs to our Sunken & Uneven Sidewalk Repair page.
Patios
Some settled patio slabs may be suitable for mudjacking.
Patio-specific settlement intent belongs to our Sunken & Uneven Patio Repair page.
Walkways
Residential walkways may be candidates when the slab remains structurally usable.
Garage Approaches
Concrete near garage entrances commonly settles differently than the garage floor.
Mudjacking may help restore the transition when conditions are suitable.
Other Exterior Concrete Slabs
Other exterior slabs may also be considered depending on:
- Slab thickness
- Concrete condition
- Amount of settlement
- Access
- Soil conditions
What Material Is Used for Mudjacking?
Mudjacking typically uses a pumpable cementitious or slurry-type material.
The exact mixture may vary by contractor and application.
The material is intended to:
- Fill voids
- Restore support
- Create lifting pressure
- Help stabilize the slab
This differs from polyurethane foam lifting, which uses an expanding foam material.
Mudjacking vs. Concrete Leveling
Mudjacking is a method.
Concrete leveling is the broader service objective.
A concrete leveling project may use mudjacking.
It may also use another lifting method.
This page owns mudjacking-specific searches.
Mudjacking vs. Concrete Lifting
Mudjacking is one type of concrete lifting.
Concrete lifting describes the general action of raising a slab.
Mudjacking describes a specific method used to do it.
Our Concrete Lifting & Raising page owns broad lifting terminology.
Mudjacking vs. Polyjacking
Mudjacking and polyjacking are both used to raise settled concrete, but they use different materials.
Mudjacking typically uses a heavier slurry-type material.
Polyjacking uses expanding polyurethane foam.
Important differences may include:
- Hole size
- Material weight
- Expansion characteristics
- Void filling
- Lift control
- Site conditions
- Cost
- Contractor preference
- Slab condition
There is no single method that is automatically best for every project.
The slab and site conditions should guide the decision.
Is Mudjacking Better Than Polyjacking?
Sometimes mudjacking may be the better fit.
Sometimes polyurethane lifting may be better.
The right method depends on:
- Slab size
- Amount of settlement
- Soil support
- Void size
- Concrete condition
- Access
- Desired lift
- Budget
- Contractor capabilities
This site keeps the two methods on separate pages so each can fully answer method-specific search intent.
Can Cracked Concrete Be Mudjacked?
Sometimes.
A slab can have cracking and still remain suitable for lifting.
What matters is the severity.
Mudjacking may be reasonable when:
- The slab remains largely intact
- Cracks are limited
- Pieces are not moving independently
- Surface deterioration is manageable
- Settlement is the main issue
A badly fragmented slab may not lift evenly.
Can Broken Concrete Be Mudjacked?
A severely broken slab may not be a good candidate.
Mudjacking works best when the slab can move as a reasonably stable unit.
If the concrete is broken into multiple loose sections, replacement may provide better value.
Can Mudjacking Fix Concrete Cracks?
No, not by itself.
Mudjacking may improve the slab's elevation, but existing cracks may remain.
After the slab is raised, cracks may:
- Remain visible
- Close slightly
- Shift
- Require separate repair
Crack repair and slab lifting are separate services.
Does Mudjacking Fill Voids?
Yes, filling voids beneath concrete is one of the main functions of the process.
The pumped material can occupy open space beneath the slab.
That may help restore support.
However, the repair still depends on:
- Soil condition
- Drainage
- Continued erosion
- Slab condition
- Extent of voids
Filling a void does not automatically eliminate the cause of the void.
How Much Can Mudjacking Raise Concrete?
There is no single amount that applies to every slab.
Practical lift depends on:
- Slab thickness
- Slab size
- Settlement
- Crack condition
- Adjacent surfaces
- Drainage
- Soil support
The objective is controlled correction.
A slab does not always need to return perfectly to its original elevation to provide a useful improvement.
Can Mudjacking Lift Concrete Too High?
Yes.
Overlifting can create:
- High joints
- New drainage problems
- Stress cracks
- Misalignment
- Rough transitions
Controlled lifting matters.
The slab should be brought toward a useful elevation—not simply raised as far as possible.
Mudjacking for Driveway Settlement
Driveways often settle near:
- Garage doors
- Joints
- Low corners
- Sidewalk crossings
- Drainage paths
Mudjacking may be considered when the driveway slab remains usable.
However, broad driveway settlement intent remains with Page 6.
This page stays focused on the mudjacking method.
Mudjacking for Sidewalks
A sunken sidewalk slab may sometimes be mudjacked to improve:
- Elevation
- Transitions
- Walkability
- Drainage
Mudjacking may be one option when the concrete remains sound enough to lift.
Sidewalk-specific settlement intent stays with Page 8.
Mudjacking for Patios
Settled patios may create:
- Low spots
- Water pooling
- Poor slope
- Uneven furniture areas
- Drainage toward a home
Mudjacking may be considered where slab and site conditions are suitable.
Patio-specific settlement intent remains with Page 18.
Mudjacking Near Foundations
Concrete near a foundation needs careful evaluation.
The final slope should not direct water toward the building.
If the slab has settled toward the structure, lifting may help restore drainage when practical.
Any lifting method used near a foundation should account for:
- Existing slope
- Water flow
- Slab position
- Adjacent surfaces
- Foundation elevation
Mudjacking Around Steps
A settled slab near steps can alter the first step height.
Mudjacking may help improve that transition when the slab remains suitable.
The surrounding:
- Steps
- Porch
- Walkway
- Adjacent slabs
should be considered together.
Mudjacking Around Tree Roots
Tree roots can complicate concrete lifting.
Sometimes one slab looks low because another slab has been pushed upward.
Before mudjacking near a tree, it is important to determine:
- Which slab moved
- Whether roots are lifting concrete
- Whether settlement is also occurring
- Whether future root growth may affect the repair
Lifting the wrong slab can make the elevation difference worse.
How Long Does Mudjacking Last?
Mudjacking can provide long-lasting improvement when:
- The slab remains suitable
- Soil conditions are stable
- Drainage is controlled
- Erosion is not continuing
- The lifting material restores adequate support
The slab can settle again if the underlying site continues changing.
No concrete lifting method should be described as permanent in every situation.
Why Mudjacking Repairs Can Fail
Mudjacking may not hold as expected when the underlying problem continues.
Potential causes include:
Continued Soil Settlement
If soil keeps compressing, the slab can move again.
Ongoing Erosion
Water may continue removing material beneath the slab.
Poor Drainage
Repeated saturation can affect supporting soil.
Severe Concrete Damage
A weak or fragmented slab may not respond well.
Incorrect Repair Method
Some conditions may be better suited to another lifting method or replacement.
Mudjacking vs. Concrete Replacement
Mudjacking may make sense when:
- Settlement is the main issue
- The slab remains structurally usable
- Surface deterioration is limited
- Cracking is manageable
- A reasonable lift can be achieved
- Repair preserves useful concrete
Replacement may make more sense when:
- The slab is badly broken
- Deterioration is severe
- Multiple sections are unstable
- Settlement is extreme
- Lifting would not create a practical result
- The concrete has little useful life remaining
The decision should be based on the entire slab—not just the fact that it sank.
Is Mudjacking Cheaper Than Replacement?
It often can be because it may avoid:
- Demolition
- Hauling
- Base reconstruction
- Forming
- New concrete placement
- Cure time
But price depends on the actual job.
Detailed cost intent belongs to our Concrete Repair Cost Guide.
Mudjacking in Cedar Rapids, Iowa
Concrete Repair Pros provides mudjacking evaluations in Cedar Rapids, IA, for settled concrete around homes and properties.
Common Cedar Rapids applications may include:
- Driveways
- Sidewalks
- Walkways
- Patios
- Garage approaches
- Exterior slabs
Local concrete settlement can be influenced by:
- Freeze-thaw cycles
- Soil settlement
- Drainage
- Erosion
- Moisture
- Disturbed fill
If you are searching for mudjacking in Cedar Rapids or a mudjacking contractor in Cedar Rapids, the first step is determining whether the slab is actually a good candidate for this method.
Mudjacking in Iowa City, Iowa
We also provide mudjacking evaluations in Iowa City, IA, and surrounding communities.
Potential causes of settlement include:
- Soil movement
- Freeze-thaw conditions
- Water drainage
- Utility work
- Erosion
- Poor compaction
- Moisture changes
Mudjacking may be considered for suitable driveways, sidewalks, patios, walkways, garage approaches, and other exterior slabs.
Residential Mudjacking
Residential mudjacking commonly involves existing concrete around a home.
Potential applications include:
- Driveways
- Sidewalks
- Patios
- Walkways
- Garage approaches
- Entry slabs
The objective is to preserve suitable concrete when settlement is the primary problem.
Commercial Mudjacking
Commercial properties may also have settled slabs.
Potential locations include:
- Storefront sidewalks
- Apartment walkways
- Office entrances
- Parking-lot sidewalks
- Common areas
- Exterior slabs
Commercial projects may involve additional considerations such as:
- Pedestrian traffic
- Access
- Scheduling
- Property-management coordination
Signs Mudjacking May Be Worth Considering
Mudjacking may be worth evaluating when you notice:
- A low concrete slab
- Uneven joints
- Water pooling
- Settlement near a garage
- A dropped sidewalk panel
- A tilted patio
- Voids beneath slab edges
- Cracks associated with settlement
- Changes in slab slope
The concrete should still have enough useful life to justify lifting it.
Previously Mudjacked Concrete
Mudjacked slabs may show signs of previous work.
You may notice:
- Patched drilling holes
- Filled cracks
- Old joint repairs
- Uneven patches
- Evidence of previous lifting
If the concrete has settled again, possible causes include:
- Continuing soil settlement
- Drainage
- Erosion
- Base movement
A previous repair does not automatically mean the slab cannot be raised again, but the reason for repeat settlement matters.
Our Mudjacking Evaluation Process
1. Inspect the Concrete
We look at:
- Cracks
- Surface deterioration
- Slab integrity
- Broken sections
- Previous repairs
2. Evaluate Settlement
We assess:
- Low areas
- Elevation differences
- Slope
- Drainage
- Adjacent surfaces
3. Determine Why the Slab Sank
Possible causes include:
- Soil settlement
- Poor compaction
- Erosion
- Drainage
- Disturbed soil
- Freeze-thaw movement
4. Determine Whether Mudjacking Makes Sense
The method should fit:
- Slab size
- Concrete condition
- Amount of settlement
- Access
- Underlying support
5. Compare Lifting Options
Depending on the project, mudjacking may be compared with:
- Polyjacking
- Other lifting methods
- Replacement
6. Raise the Slab Gradually
If mudjacking is selected, the slab is raised in controlled increments.
7. Check the Final Result
We evaluate:
- Elevation
- Slope
- Drainage
- Adjacent surfaces
- Walking or driving transitions
Frequently Asked Questions About Mudjacking
What is mudjacking?
Mudjacking is a method of lifting settled concrete by pumping material beneath the slab to fill voids and create lift.
Is mudjacking the same as slabjacking?
Yes. Slabjacking or slab jacking is commonly used as another term for mudjacking.
Is mudjacking the same as concrete leveling?
No. Mudjacking is a method used to perform concrete leveling.
Is mudjacking the same as concrete lifting?
Mudjacking is one type of concrete lifting.
Can a driveway be mudjacked?
Sometimes. The driveway slab must still be in suitable condition for lifting.
Can sidewalks be mudjacked?
Yes, some settled sidewalk slabs may be candidates.
Can patios be mudjacked?
Some settled patio slabs may be suitable depending on their condition and access.
Can cracked concrete be mudjacked?
Sometimes. Limited cracking does not automatically rule out lifting.
Can badly broken concrete be mudjacked?
Severely fragmented slabs are often poor candidates because the pieces may not move together.
Does mudjacking repair cracks?
No. It raises the slab. Crack repair may still be needed separately.
Does mudjacking fill voids under concrete?
Yes. Filling voids is part of the process.
Can mudjacking improve drainage?
It may improve drainage when settlement caused an incorrect slope.
Is mudjacking permanent?
Not always. Continued soil movement, erosion, or drainage problems can cause future settlement.
Is mudjacking better than polyjacking?
It depends on the slab and site conditions. Neither method is automatically best for every project.
Is mudjacking cheaper than replacing concrete?
It often can be when the existing slab remains worth saving, but detailed pricing depends on the project.
How much does mudjacking cost?
Cost depends on slab size, amount of settlement, access, number of lift points, concrete condition, and project complexity. Detailed cost intent belongs to our Concrete Repair Cost Guide.
Do you provide mudjacking in Cedar Rapids?
Yes. Concrete Repair Pros provides mudjacking evaluations in Cedar Rapids and surrounding communities.
Do you provide mudjacking in Iowa City?
Yes. We provide mudjacking evaluations in Iowa City and surrounding communities.
If your concrete has sunk, settled, tilted, developed low spots, or lost support underneath, the slab may not automatically need replacement.
Show us the problem.
We can evaluate the concrete, amount of settlement, slab condition, drainage, and surrounding support to determine whether mudjacking or another lifting method makes sense.
Concrete Repair Pros provides mudjacking and concrete lifting evaluations throughout Cedar Rapids, Iowa City, and surrounding communities.
Don't Replace Good Concrete Just Because One Area Failed.
A damaged slab does not automatically need demolition. We look at how much sound concrete remains, whether movement is active, the depth of deterioration, drainage and the surrounding conditions.
If repair is still practical, the goal is simple: save what is worth saving.
BEFOREAFTERFrom Damage to a Clear Repair Plan.
Tell us what you're seeing and upload project photos.
We look at damage, movement, drainage and surrounding concrete.
We explain whether repair makes sense and what approach fits.
Approved work is completed for the actual condition—not a generic fix.
Send the Damage. We'll Help Determine the Next Step.
Include your address, a short description and up to six photos. That's enough to start the conversation.
Repair It Before Replacement Becomes the Only Option.
Cedar Rapids · Iowa City · surrounding Eastern Iowa communities