Fix a Sinking or Settling Patio
A sinking patio can quickly turn an outdoor living space into a frustrating problem. Uneven slabs create trip hazards, cause furniture to sit unevenly, and allow water to pool around the surface. Over time, a settled patio can also pull away from the house or create drainage issues near the foundation.
STL Polyjack provides patio 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 patio leveling projects can be completed in just a few hours, and the surface is typically ready to use the same day.
Why Patios Sink
Patios are often built on soil that can shift over time. Changes in moisture, erosion, and natural settling can weaken the ground beneath the slab.
Common causes of sinking patios include:
- Soil erosion from rainwater or poor drainage
- Voids forming beneath the patio slab
- Poor soil compaction during construction
- Seasonal soil expansion and contraction
- Water pooling around the patio area
When these issues occur, the concrete loses support underneath. Concrete leveling restores stability by filling the empty spaces and strengthening the soil beneath the slab.
Signs Your Patio Needs Leveling
Patio settlement can happen slowly, which means homeowners often notice the issue only after it becomes more obvious.
You may need patio leveling if you notice:
- Sections of the patio sitting lower than others
- Water pooling on the patio after rain
- Cracks forming across the slab
- Patio slabs tilting away from the house
- Furniture rocking or sitting unevenly
- Gaps forming between the patio and nearby structures
If the slab continues to settle, these problems can worsen and affect both safety and drainage around the home.
Sometimes a sinking patio is part of a larger concrete issue around the property. If you are seeing uneven surfaces in multiple areas, Saint Louis Polyjack also provides driveway leveling, garage floor leveling, and walkway and sidewalk leveling. In some cases, soil movement can create empty spaces beneath slabs, 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 Patio Leveling
Saint Louis Polyjack uses a polyurethane foam injection process to lift and stabilize patio slabs safely and efficiently. Instead of tearing out 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 so we can reach the empty space beneath the concrete.
2. Inject Expanding Polyurethane Foam
High-density foam is injected under the patio. 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 patio is level, the drill holes are patched neatly. Most patios are ready to use shortly after the repair is completed.
Benefits of Patio Leveling
Concrete lifting offers several advantages compared to replacing a patio.
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
- A safer and more level outdoor space
Instead of demolishing the patio, leveling restores the existing concrete while correcting the underlying problem.
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 – Patio Leveling
Clear answers about patio repairs, lifting methods, and how leveling restores outdoor concrete.
Yes. If the concrete is structurally sound, polyurethane lifting can raise and stabilize the slab without removing it. You can learn more about how the repair works on our concrete leveling process page.
Most patio leveling projects can be completed in just a few hours. The repair process is much faster than replacing the patio slab.
Patios are typically ready to use the same day because the polyurethane foam cures quickly and provides strong support beneath the slab.
Patios often sink due to soil erosion, drainage issues, or voids beneath the slab. In some cases, restoring support with void filling helps prevent further settlement.
Many homeowners choose polyurethane lifting because it uses smaller drill holes and lightweight material that stabilizes the soil beneath the slab. You can learn more on our poly leveling vs mudjacking page.
Yes. The same lifting method can repair driveways, garage floors, sidewalks, and pool decks using the same proven leveling process.
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.
Serving St. Charles, St. Louis, Sunset Hills, Fenton, Kirkwood, Webster Groves, Ballwin, Chesterfield, Crestwood & Arnold.
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