If you’ve got a sidewalk panel that’s tilted, a driveway that’s dipping near the garage, or a patio that suddenly holds water, you don’t need a full tear-out to get it back to level in a lot of cases. Concrete raising (also called lifting or leveling) can restore the slab by stabilizing what’s underneath it, then lifting it into position with polyurethane foam injection.
What “concrete raising” actually fixes (and what it doesn’t)
Concrete raising is a good fit when the slab itself is still in decent shape and the real issue is below it: voids, washed-out soils, or a base that compacted over time. That’s why you’ll see it used for things like sidewalks, driveways, patios, pool decks, porches/steps, and even some interior slabs.
If the concrete is shattered into many pieces, heaved from frost, or structurally failed, replacement might be the better call. A real inspection should say that out loud, not dance around it.
Why polyurethane foam is the go-to method now
Our library content makes a simple point: polyurethane is the preferred approach because it’s clean, precise, and built for long-term support, but results depend on the material and the installer, not the buzzword.
Cheaper bids can come from fewer injection points or lower-grade, high-yield foams that don’t hold up the same way over time.
How concrete raising works (the “Drill, Fill, Patch” process)
We outline our foam injection process in three straightforward steps:
Step 1: Drill
Small holes (they describe them as about the size of a dime) are drilled into the settled slab, and injection ports are installed for controlled delivery.
Step 2: Fill
A two-part polymer is injected through the ports. It flows into the voids and weak areas beneath the slab, then expands into a structural foam that both fills and lifts.
Step 3: Patch
After lifting, the material cures quickly (about 15 minutes), ports are removed, and the holes are filled with grout so the spots are “virtually unnoticeable.”
Local soils and local weather
In Northern Illinois, especially around the Chicagoland area, slabs move because the ground changes. We call out “extreme environmental changes” in the region and positions polyurethane foam as a material that won’t wash out like mudjacking slurries.
That’s worth paying attention to when you’re comparing options, because you’re not just buying “lifting.” You’re buying the base support that keeps it from settling again.
What does concrete raising cost in Northern Illinois?
Prices vary by slab size, how far it dropped, access, and how much foam is needed. We give typical starting ranges in the Chicago area:
- Polyurethane leveling often starts around $600 for most projects (excluding very small ones).
- Driveways and patios commonly land in the $750 to $1,500 base range.
Treat those as rough brackets, not a quote. The inspection is where it gets real.
How to choose a concrete raising contractor (without getting sold)
Our contractor-selection guidance focuses on a few things homeowners actually care about: how the repair will look, how long it will last, and what’s hidden inside the warranty.
Pay attention to the hole size and patching
They note their polyurethane process uses small 5/8-inch holes that get patched and blend over time. If a contractor is vague about hole size or patching, that’s a tell.
Don’t treat “warranty” like a magic word
We emphasize reading the fine print and point out how some warranties are written to protect the contractor more than the homeowner.
They also state their work is backed by a 10-year warranty, and contrast that with shorter 1–2 year warranties common with mudjacking or replacement contractors.
Specialization matters
Their stance is blunt: polyurethane lifting isn’t a casual add-on service. The equipment, material selection, and install process determine whether the slab stays supported.
When you should call for an inspection
If any of these are happening, it’s worth getting someone out:
- You can feel a trip edge on the sidewalk
- Water is draining toward the house instead of away
- The driveway dropped near the garage or apron
- Steps or a stoop pulled away and feel “off” underfoot
We offer free estimates and serve a large Northern Illinois / Chicagoland footprint, with service-area pages broken down by towns and counties.