Sidewalk Leveling & Repair
Uneven Sidewalk? Lift It — Don't Replace It.
Benchmark Concrete Raising lifts and levels sunken sidewalk slabs throughout Minneapolis, St. Paul, and the greater Twin Cities metro using polyurethane foam injection. No demolition. No mess. Most jobs completed in a few hours, and the surface is walkable the same day. Free estimates across our entire service area.
Why Sidewalks Sink
It's a Soil Problem, Not a Concrete Problem
Uneven sidewalks in Minnesota are almost always caused by soil movement beneath the slab, not by failed concrete. The Twin Cities metro sits on clay-heavy soils that expand when wet and contract when dry. Freeze-thaw cycles accelerate that movement significantly every winter, forming voids beneath concrete panels as soil shifts or washes away. The slab settles into those voids.
When concrete sinks, it creates trip hazards, drainage issues, and potential liability concerns for homeowners, HOAs, and property managers. In most cases, the concrete itself is structurally sound. The problem is entirely below the surface.
- Soil erosion from water runoff or poor drainage is one of the most common causes of sidewalk settlement in the Twin Cities
- Minnesota's freeze-thaw cycle pushes soil movement hard every winter, forming new voids beneath slabs each season
- Improper soil compaction during original installation leaves slabs vulnerable to settlement from the start
- Natural soil movement beneath the slab occurs over time regardless of installation quality
The Solution
Polyurethane Foam Lifting: Faster, Less Expensive, Same Result
Polyjacking lifts sunken sidewalk slabs by injecting high-density polyurethane foam beneath the concrete through small holes roughly the diameter of a dime. The foam expands, fills the void, and raises the panel back to a safe, level position. The holes are patched. The surface is walkable before we leave.
Unlike mudjacking, polyurethane foam is moisture-resistant and does not break down over time. It weighs about 2 lbs per cubic foot versus 100+ lbs for mudjacking slurry, so it adds no load to already-unstable soil. And because the existing concrete is reused rather than torn out, the cost is typically 50 to 70 percent less than full replacement.
- Same-day results — the sidewalk is walkable within hours of the job being completed
- 50 to 70 percent less than tearing out and replacing the same concrete
- Small drill holes and no demolition debris — minimal disruption to the surrounding area
- High-density polyurethane foam is moisture-resistant and holds through Minnesota's freeze-thaw cycles year after year
Leveling vs. Replacement
How to Know Which One You Actually Need
Most homeowners who call us have already been quoted for full replacement. In roughly 70 percent of cases, they don't need it. If the concrete is structurally intact, lifting is almost always the better call — faster, less expensive, and just as durable.
Choose Leveling If
- The concrete is minimally cracked or not cracked at all
- The slab has sunk or shifted but is otherwise intact
- You want a faster, more affordable solution
Replacement May Be Needed If
- Concrete is severely broken or crumbling
- Panels are structurally compromised beyond repair
We evaluate every job before committing. If replacement is the right call, we'll say so. We won't take a job we can't do well.
What to Expect
The Process, Start to Finish
Most sidewalk leveling jobs are completed in a single visit. Here's what the process looks like:
- On-site evaluation of your sidewalk slabs
- Small, strategically placed injection holes drilled through the concrete
- Polyurethane foam injected beneath the slab — the foam expands, fills the void, and lifts the panel to grade
- Final leveling check, hole patching, and cleanup
The foam cures in about 15 minutes. The sidewalk is walkable the same day.
Common Questions
Sidewalk Leveling: FAQ
Can a sunken sidewalk be leveled instead of replaced?
In most cases, yes. If the concrete is structurally intact, polyurethane foam lifting restores the slab to proper grade in a single visit at a fraction of replacement cost. We evaluate every job upfront and will tell you honestly if replacement is the better option.
Why did my sidewalk sink in the first place?
Almost always, it's a soil problem beneath the slab. The Twin Cities metro sits on clay-heavy soils that shift with moisture changes, and Minnesota's freeze-thaw cycle accelerates that movement significantly. Voids form under the concrete as soil erodes or compresses, and the panel settles into them. The concrete itself is often completely sound.
Is this the same as mudjacking?
No. Benchmark Concrete Raising uses polyurethane foam, not mudjacking slurry. Polyurethane foam is lighter, stronger, and moisture-resistant — making it better suited to Minnesota's freeze-thaw conditions than traditional mudjacking. The foam also cures in minutes rather than requiring days to set.
How much does sidewalk leveling cost?
Most jobs run 50 to 70 percent less than full replacement. Pricing depends on slab size and severity of settlement. We provide free on-site estimates. Call 952-295-0500 or request a quote online.
Is the sidewalk usable right away?
Yes. The polyurethane foam cures in about 15 minutes, and the sidewalk is walkable the same day. There's no waiting for concrete to cure and no days of blocked access.
How long does sidewalk leveling last?
Polyurethane foam is designed to be long-lasting and moisture-resistant, making it well suited to Minnesota's climate. It doesn't absorb water, compress, or wash away the way mudjacking slurry can. Ask about the specific warranty terms when you schedule your estimate.
The Bottom Line
Fix Your Sidewalk the Smart Way
Uneven sidewalks create trip hazards, drainage problems, and liability exposure — but in most cases, they don't need to be torn out. Polyjacking addresses the root cause directly, in a single visit, at a fraction of what replacement costs. If your sidewalk is structurally sound but uneven, replacement is rarely necessary.
We provide free estimates throughout the Twin Cities metro. Call 952-295-0500 or request a quote online to get started.
