Sidewalk Raising and Lifting
Sidewalk Raising. Lift It, Don't Replace It.
Benchmark Concrete Raising raises and lifts sunken sidewalk slabs throughout Minneapolis, St. Paul, and the greater Twin Cities metro using polyurethane foam injection. Sidewalk raising takes a few hours, costs 50 to 70 percent less than replacement, and the surface is walkable the same day. No demolition. No mess. 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, which is why raising the slab back to grade fixes it and tearing it out usually does not need to happen.
- 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
Sidewalk Lifting With Polyurethane Foam: Faster and Less Expensive
Sidewalk lifting, also called polyjacking, raises sunken 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, concrete sidewalk raising typically costs 50 to 70 percent less than full replacement.
- Same-day results, and 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, so there is minimal disruption to the surrounding area
- High-density polyurethane foam is moisture-resistant and holds through Minnesota's freeze-thaw cycles year after year
Raising 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, raising the sidewalk is almost always the better call: faster, less expensive, and just as durable.
Choose Sidewalk Raising 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 Sidewalk Raising Process, Start to Finish
Most sidewalk raising 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, where it 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.
Sunken Sidewalk Repair
What a Sunken Sidewalk Actually Costs You
A sunken sidewalk is not just a cosmetic problem. A vertical lip of more than half an inch between panels is a trip hazard, and in most Minnesota cities the property owner carries responsibility for the walk in front of their home. Settled panels also redirect water toward foundations instead of away from them.
Sunken sidewalk repair through foam raising addresses both at once. The lip goes away, the slope is restored, and the concrete you already paid for stays in the ground.
Common Questions
Sidewalk Raising and Lifting: FAQ
Can a sunken sidewalk be raised instead of replaced?
In most cases, yes. If the concrete is structurally intact, polyurethane foam raises the slab back 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.
How much does sidewalk raising cost?
Sidewalk raising typically runs 50 to 70 percent less than full replacement. What moves the number is how many slabs need lifting, how far they have settled, and how easy the area is to reach. We provide free on-site estimates. Call 952-295-0500 or request a quote online.
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 sidewalk raising the same as mudjacking?
No. Benchmark Concrete Raising uses polyurethane foam, not mudjacking slurry. Polyurethane foam is lighter, stronger, and moisture-resistant, which makes it better suited to Minnesota's freeze-thaw conditions than traditional mudjacking. The foam also cures in minutes rather than requiring days to set.
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 raising last?
Polyurethane foam is designed to be long-lasting and moisture-resistant, which suits 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.
Other Concrete We Raise
Same Method, Different Slab
Sidewalks are one of several surfaces we raise with polyurethane foam across the Twin Cities metro:
The Bottom Line
Raise 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. Sidewalk raising with polyurethane foam 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.
