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Basement Floor Leveling - Polyjacking Services
At Anchored Walls, we use advanced polyurethane injection techniques to lift and re-level basement floors quickly and cleanly.
At Anchored Walls, we use advanced polyurethane injection techniques to lift and re-level basement floors quickly and cleanly. It’s a proven, cost-effective alternative to full slab replacement, engineered to deliver lasting results with minimal disruption to your home.
Why Basement Floors Sink
Over time, the soil beneath your basement can shift, settle, or erode—especially in areas with expansive clay, poor compaction, or excess moisture. When that happens, the concrete slab above can begin to crack or dip in isolated sections.
Common causes include:
- Poorly compacted soil at the time of construction
- Soil washout due to plumbing leaks or groundwater
- Shrink-swell cycles from moisture changes
- Structural settlement in areas with weak subgrade
In most cases, the concrete itself hasn’t failed—the problem lies beneath it.
Google reviews
What homeowners say.
4.9 / 5 from 286 Google reviews.
★★★★★ Google
Gabe & Taxson did a wonderful job of waterproofing our basement. They worked so hard chiseling concrete, carrying it up the stairs in buckets, then carrying rock and replacement cement down...Read full review
Gabe & Taxson did a wonderful job of waterproofing our basement. They worked so hard chiseling concrete, carrying it up the stairs in buckets, then carrying rock and replacement cement down the stairs to fill in the dug up places, but most of all, they cleaned up the mess! Kip McMillen from United Services recommended this company to do our job. We would recommend this company for any job that you may have.
MM
★★★★★ Google
We worked with Brad to level the concrete slabs on our driveway and patio, and the results are fantastic—everything is perfectly level and we couldn’t be happier with the quality of his...Read full review
We worked with Brad to level the concrete slabs on our driveway and patio, and the results are fantastic—everything is perfectly level and we couldn’t be happier with the quality of his work. What really sets Brad apart, though, is his character and willingness to go the extra mile. While I was out of town, our family car battery died right before my family was supposed to leave for vacation. Brad didn’t hesitate—he went to the auto parts store, picked up a new battery, and installed it so they could get on the road in time. That kind of kindness and effort goes far beyond what you’d ever expect, and it meant so much to us. Truly excellent work and an even better person. Thank you.
AS
★★★★★ Google
Anchored Walls of Winterset stabilized our Basement walls, leveled our driveway, and found an incredible and invisible solution to our 25 year sump pump drain exit. Matt Clayton was...Read full review
Anchored Walls of Winterset stabilized our Basement walls, leveled our driveway, and found an incredible and invisible solution to our 25 year sump pump drain exit. Matt Clayton was consistently kind and patient. He nailed our estimate and was Readily available for questions before, during, and after the project. Debbie was quick, responsive, and friendly to give us speedy and accurate answers to many questions. Finally, Brad was the man who finally solved our 25 year sump pump problem. He was super respectful with my wife, and somehow installed 30 foot of PVC into our yard, leaving zero evidence. You're work is amazing and we are more thankful for you than we can express! All this to say, we strongly recommend and refer Anchored Walls of Winterset. Great job and God bless you for your Efforts.
DT
★★★★★ Google
Anchored Walls revently completed work on our driveway. It was 13 years old and the expansion joints adjacent to the garage, front sidewalk and the foot of it near the street have erroded...Read full review
Anchored Walls revently completed work on our driveway. It was 13 years old and the expansion joints adjacent to the garage, front sidewalk and the foot of it near the street have erroded and water was entering underneath. We were concerned about freeze-thaw damage. The AW team presented the most complete and best estimate. A few days later Zack arrived and did the work in 1/2 day. It was a fantastic job and looks great. He was courteous and very personable. 5-star recommendations all around.
KW
★★★★★ Google
They did a good job lifting our steps. Good price too
They did a good job lifting our steps. Good price too
LE
Where Basement Floor Leveling Is Most Common
- Finished and unfinished basements
- Storage or utility rooms
- Laundry areas
- Slabs with uneven tiles, dips, or visible cracking
- Any location with sinking or sloping basement surfaces
If your basement floor has settled even slightly, early intervention can prevent further damage and avoid larger structural concerns.
How Our Basement Floor Leveling System Works
We use a technique known as polyurethane foam injection, or polyjacking, to raise and support basement slabs from below. This system is strong, stable, and designed for long-term performance in interior environments.
Here’s how the process works:
- 1. Inspection
A trained specialist inspects your floor and identifies the areas of settlement or voids below the slab. - 2. Precision Drilling
Small holes are drilled through the affected slab in strategic locations. - 3. Foam Injection
A high-density polyurethane foam is injected under the slab. As it expands, the foam fills any voids and gently lifts the concrete back to its proper elevation. - 4. Sealing and Cleanup
Once the slab is level, the holes are patched, and the floor is ready for light use within hours.
Benefits of Foam-Based Leveling
- Quick Installation – Most projects are completed in a single day.
- Minimal Disruption – No demolition or heavy equipment required.
- Clean and Precise – Interior work is contained and low-impact.
- Long-Lasting Results – Foam won't shrink or degrade over time.
- Avoids Full Replacement – Much less costly than tearing out and pouring new concrete.
Schedule an Inspection
Basement floor issues don’t correct themselves, and the longer they’re left untreated, the more they can affect your home’s safety and resale value. Anchored Walls provides lasting basement floor leveling solutions backed by decades of structural repair experience.
Contact us today to schedule an inspection and find out if polyurethane slab leveling is the right approach for your home.
Experienced hands. A clear plan.
Helping Iowa homeowners since 1978.
A repair plan built around your home.
Start with a free inspection. We explain what we find and put the recommended work in writing, so you can make an informed decision.
★★★★★Google review
“We worked with Brad to level the concrete slabs on our driveway and patio, and the results are fantastic—everything is perfectly level and we couldn’t be happier with the quality of his work. What really sets Brad apart, though, is his character and willingness to go the extra mile. While I was out of town, our family…”
Adam S.Verified Google review · Winterset, IA · Sep 2025
Money-back guarantee
Your money is never at risk. We stand behind our work with a written money-back guarantee.
Five-star service guarantee
A clear plan, respectful crews, and a commitment to the experience as well as the repair.
Frequently Asked Questions
What causes crawl space moisture?
Crawl space moisture comes from water seepage, improper yard drainage systems, soil settlement and condensation. Regardless of whether your crawl space is dirt, concrete, vented or unconditioned, these lower areas underneath the home tend to endure the most damage due to the many changes in weather conditions, high temperatures and humidity levels. Humidity and moisture easily travel through your crawl space and can begin to infiltrate the structure of your home.Damp or wet crawl spaces are perfect homes for insects, rodents and other critters. This area underneath your home can be extremely unhealthy, destructive and dangerous. Your wet crawl space can also act as a breeding ground for mold and mildew growth. Mold spreads easily throughout your home when it begins in your crawl space. Mold, as well as wood rot, can negatively affect your home’s indoor air quality. That’s why it’s important to take care of crawl space moisture problems as soon as you notice them.
How soon can I use the concrete after leveling?
That depends on the method. Polyurethane foam cures within minutes, allowing use the same day—often within an hour. Slurry-based lifting methods may require a longer cure time, but are still far quicker than replacing the slab.
How long does concrete leveling take?
Most concrete leveling jobs can be completed in just a few hours. The size of the slab, the extent of the sinking, and the repair method all affect timing, but it’s typically much faster and less disruptive than full concrete replacement.
How does concrete leveling work?
Concrete leveling restores sunken or uneven slabs by injecting material beneath the surface to raise it back into place. Small holes are drilled into the concrete, and a lifting compound, such as foam or slurry, is pumped underneath. The slab is gently raised, leveled, and the holes are patched cleanly once the work is complete.
How Much Does Concrete Leveling Cost?
Costs depend on how much material is needed. It’s usually half the cost (or less) of full concrete replacement. We use our own advanced estimating software to provide accurate quotes.
Explore concrete lifting & leveling
Polyurethane Foam Lifting vs. Mudjacking
When concrete starts to sink around your home, whether it’s the front walk, the driveway, or part of your foundation, it’s a sign that something underneath has shifted.
Explore
Concrete Driveway Lifting
Using advanced polyurethane injection technology, we raise sunken concrete slabs back to a safe, level position, often in just a few hours.
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Frost Heave
In our Iowa service area, winter doesn’t just bring snow and ice.
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Concrete Tripping Hazards
Uneven concrete might seem like a cosmetic issue at first, but it poses a serious risk to your safety and your property value.
ExploreA local team for your Iowa home.
From our Winterset location, we serve Des Moines, Ankeny, Waukee, Johnston, Urbandale, Clive, Ames, and surrounding communities. Check your ZIP for service at your address.
Highlighted counties contain service ZIP codes. Coverage varies within each county; check your ZIP and confirm your address when scheduling.