Foam Lifting / Polyjacking
Lighter material and smaller holes
Uses expanding polyurethane foam to lift and support settled concrete.
Foam Concrete Lifting in Central Illinois
Foam concrete lifting uses expanding polyurethane foam to raise and support settled slabs. It can be a good option, but it is not magic.
This guide is for homeowner planning and general education. Site conditions, slab access, and local contractor pricing can change project recommendations.
Foam concrete lifting uses expanding polyurethane foam under a settled slab. The holes are usually smaller, the material is lighter than traditional slurry, and the set time can be quick.
That does not make foam magic. The concrete still has to be worth saving, and the cause of settlement still matters. Water, voids, roots, cracks, and access can all change the recommendation.
If you are comparing foam against slurry, read mudjacking vs polyjacking. If you are worried about budget, start with the cost guide.
How It Works
How foam concrete lifting usually works
The contractor drills small holes in the settled slab, injects expanding foam below the concrete, and watches the slab as it lifts. The foam fills space underneath and cures quickly compared with some traditional materials.
The details matter: how much void is under the slab, how far it dropped, where water is going, and whether the concrete is still strong enough to lift.
Before choosing foam, ask why it makes sense for your slab and whether mudjacking or polyjacking is the better comparison.
Compared to Other Options
Foam lifting vs mudjacking vs replacement
Mudjacking / Slab Jacking
Cost-effective lifting for many slabs
Uses slurry or grout pumped underneath the slab.
Replacement
Concrete too damaged to lift well
Tear-out and repour may be better if the slab is failing.
Where It May Help
Places foam lifting may be worth asking about
Driveways
Settled driveway slabs can sometimes be lifted with foam.
Sidewalks
Foam may help lift panels that dropped and created trip edges.
Patios
A settled patio may be a candidate if the slab is still intact.
Steps
Step and stoop areas need a careful look before any method is chosen.
Garage slabs
Foam may be discussed where access, voids, or weight matter.
Pool decks
Pool decks often raise cleanup, safety, and drainage questions.
Commercial slabs
Fast set time and lighter material may be useful in some business settings.
Voids under concrete
Foam can fill voids, but the water or washout cause still matters.
When It May Make Sense
When I'd ask about foam lifting
I would ask about foam lifting when a lighter material may be helpful, smaller holes are preferred, fast set time matters, or access and cleanup are part of the concern.
It can be worth discussing for a driveway, sidewalk, patio, pool deck, garage slab, or void under concrete if the slab itself is still mostly intact.
Do not let anyone sell it like magic. The cause of the settling still matters.
When It May Not
When foam lifting may not be the answer
Foam lifting may not be the right move when the concrete is badly broken, crumbling, root-heaved, unstable, or too thin to lift well.
Severe drainage problems can also change the recommendation. If water keeps washing under the slab, the repair needs to account for that, not just fill the latest empty space.
If the slab is rough, compare foam lifting with concrete replacement before deciding.
Cost
What affects foam concrete lifting cost?
Foam lifting can cost more than mudjacking, but the quote depends on the project. Foam amount, void size, access, slab condition, and how much lift is needed all matter.
- Size
- Bigger areas usually need more time and material.
- Foam/material needed
- Void size and lift amount can change foam usage.
- Void size
- More empty space under the slab can raise material needs.
- Amount of lift
- Small corrections and larger drops are different jobs.
- Access
- Tight areas can affect setup and pricing.
- Slab condition
- The concrete still needs to be worth lifting.
- Drainage cause
- Water issues can affect the repair plan.
- Replacement comparison
- Rough slabs should be compared against replacement.
Foam Lifting FAQs
Foam concrete lifting questions
What is foam concrete lifting?
It is a concrete leveling method that uses expanding polyurethane foam under a settled slab to lift and support it.
Is foam lifting the same as polyjacking?
Yes, those terms are often used for the same general foam lifting method.
Is foam lifting better than mudjacking?
Sometimes. Foam is lighter and can set fast, but mudjacking can be practical and cost-effective. The slab decides the conversation.
Does foam lifting cost more?
Often it can, because of material and equipment. The actual price depends on the project.
Can foam lifting fix cracked concrete?
Maybe if the slab is still stable. If it is broken up or crumbling, replacement may be smarter.
Can foam fill voids under concrete?
It can fill voids, but if water keeps washing the base out, the cause still needs attention.
Should I ask for a mudjacking quote too?
If both options are available, comparing both can help you understand cost and method differences.
Request a Quote
Want to know if foam lifting makes sense?
Tell us what's 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.