Stop Sidewalks from Sinking
Uneven sidewalks and walkways around your home can quickly become a safety concern. When concrete slabs shift or settle, they create trip hazards that can lead to injuries and liability issues. Sunken walkways can also cause water to collect in low areas, leading to further damage over time.
Saint Louis Polyjack provides walkway and sidewalk leveling using advanced polyurethane foam injection. Our process lifts and stabilizes sinking concrete from underneath—no demolition or replacement—often saving customers up to 50%. Most walkway leveling repairs can be completed in just a few hours, and the surface is typically ready to use the same day.
Why Walkways and Sidewalks Sink
Walkways and sidewalks depend on stable soil beneath the concrete for support. Over time, soil movement, erosion, and seasonal changes can cause the ground underneath to shift or wash away.
Common causes include:
- Soil erosion caused by rainwater or drainage issues
- Voids forming beneath the slab
- Poor soil compaction during installation
- Tree roots affecting the soil below the concrete
- Seasonal expansion and contraction of the ground
When these conditions occur, the concrete loses support and begins to sink or tilt. Concrete leveling restores that support by filling the voids and stabilizing the soil beneath the slab.
Signs Your Walkway or Sidewalk Needs Leveling
Settlement can happen gradually, which means uneven concrete often goes unnoticed until the problem becomes more severe.
You may need walkway or sidewalk leveling if you notice:
- Raised edges or lips between concrete slabs
- Sections of sidewalk sitting lower than others
- Trip hazards along walkways or entry paths
- Water pooling on the concrete after rain
- Cracks forming as the slabs shift
- Uneven surfaces near steps or entrances
If these issues continue to worsen, the slab may sink further and create larger safety hazards around your property.
Sometimes uneven sidewalks are connected to other concrete issues around the home. If multiple surfaces are settling, Saint Louis Polyjack also provides driveway leveling, garage floor leveling, and patio leveling. In some cases, soil movement can also create empty space beneath the slab, which may require void filling to restore proper support.
Free Concrete Leveling Estimate
Customers can also send photos of the problem area for a faster quote.
Why Property Owners Choose Saint Louis Polyjack
Serving St. Louis, Sunset Hills, Fenton, Kirkwood, Ballwin, Chesterfield, and surrounding communities.
Our Fix: Polyurethane Walkway & Sidewalk Leveling
STL Polyjack uses a polyurethane foam injection process to lift and stabilize sidewalks and walkways safely and efficiently. Instead of tearing out and replacing the concrete, our method restores support beneath the slab by filling hidden voids and strengthening the soil underneath.
Our process works in three simple steps:
1. Drill Small Access Holes
Small holes are drilled in specific areas of the slab to reach the empty space beneath the concrete.
2. Inject Expanding Polyurethane Foam
High-density foam is injected beneath the sidewalk. The material expands to fill voids, stabilize the soil, and gently lift the slab back into position.
3. Patch the Holes and Finish the Repair
Once the concrete is level, the drill holes are patched neatly. Most walkways and sidewalks are ready to walk on shortly after the repair is completed.
Benefits of Walkway & Sidewalk Leveling
Concrete lifting offers several advantages compared to replacing sidewalks or walkways.
Some of the main benefits include:
- Save up to 50% compared to replacement
- Fast repair that usually takes only a few hours
- Minimal disruption to landscaping and surrounding areas
- Long-lasting stabilization beneath the slab
- Improved drainage and reduced water pooling
- Removal of dangerous trip hazards
Instead of removing the sidewalk, leveling restores the existing concrete while correcting the problem underneath.
Why Choose STL Polyjack
When concrete starts to sink or settle, choosing the right contractor matters. STL Polyjack brings over a decade of experience and more than 1,200 completed lifts across the St. Louis area. We focus on fixing the root cause—not just the surface—using advanced polyurethane foam injection to lift and stabilize concrete without the cost and disruption of replacement. When you work with our team, you can expect:
- Over a decade of hands-on experience
- 1,200+ concrete lifting projects completed locally
- Polyurethane foam designed for long-term support
- Minimal disruption to your home or business
- Completed in hours, not days, with same-day use
- Honest evaluations and straightforward recommendations
- Repairs backed by a 5-year warranty
Whether the project involves a residential driveway, uneven sidewalk, patio, commercial slab, or structural repair, our goal is to deliver a repair that restores safety, stability, and confidence in your concrete surfaces.
FAQs – Walkway & Sidewalk Leveling
Clear answers about safety, repairs, and how concrete lifting restores uneven sidewalks.
If you notice raised edges between slabs, trip hazards, or sections of concrete sitting lower than others, the sidewalk may have lost support underneath and could benefit from leveling.
Yes. If the concrete is structurally sound, polyurethane lifting can raise and stabilize the slab without removing it. You can learn more about how this works on our concrete leveling process page.
Most sidewalk leveling projects are completed in just a few hours, making it a much faster solution than replacing the concrete.
Sidewalks are typically ready to walk on the same day because the polyurethane foam cures quickly and provides immediate support beneath the slab.
Sidewalks usually sink due to soil erosion, water runoff, or voids beneath the concrete. In some cases, filling those empty spaces with void filling helps restore support beneath the slab.
Many property owners prefer polyurethane lifting because it uses smaller drill holes and lightweight material that stabilizes the soil beneath the slab. You can read more about the differences on our poly leveling vs mudjacking page.
Yes. The same lifting process can repair driveways, patios, garage floors, and pool decks. If you are seeing uneven concrete in several areas, our team can evaluate the entire property and recommend the right repair approach.
Trusted by Leading Businesses
Areas We Serve
STL Polyjack proudly serves homeowners, businesses, and property managers across the St. Charles and St. Louis area. With over a decade of experience, we provide polyurethane concrete leveling, lifting, and structural repair solutions that restore sinking concrete without the cost of replacement. From driveways and sidewalks to warehouse floors and parking lots, we keep properties safe, level, and stable.
Serving St. Louis & Surrounding Communities
- St. Charles, MO
- St. Louis, MO
- Sunset Hills, MO
- Fenton, MO
- Kirkwood, MO
- Webster Groves, MO
- Ballwin, MO
- Chesterfield, MO
- Crestwood, MO
- Arnold, MO
- Manchester, MO
- Des Peres, MO
- Ellisville, MO
- Town and Country, MO
- Oakville, MO
- Affton, MO
- Clayton, MO
- Maryland Heights, MO
- Bridgeton, MO
- Florissant, MO
- University City, MO
If you have sinking or uneven concrete around your property, we can evaluate the issue and recommend the best solution.
We offer free estimates, and you can even send photos for a fast quote.
About Saint Louis Polyjack
Saint Louis Polyjack specializes in polyurethane concrete leveling, lifting, and structural repair throughout St. Louis, MO and surrounding communities. We raise and stabilize sinking driveways, sidewalks, patios, pool decks, warehouse floors, and more using advanced poly foam technology.
Our process is fast, clean, and long-lasting — backed by a 5-year warranty.
Office Location : 12951 Gravois Rd. Ste. 100 St. Louis, MO 63127
Uneven Concrete? Don’t Replace It — Lift It.
Get a Free Estimate Today.
✉️ stlpolyjack@stlpolyjack.com
Serving St. Charles, St. Louis, Sunset Hills, Fenton, Kirkwood, Webster Groves, Ballwin, Chesterfield, Crestwood & Arnold.
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