Voids Under Your Concrete? Fill Them Before It Gets Worse
If there’s empty space under your concrete, it’s only a matter of time before problems show up.
Voids form when soil washes out or settles beneath the slab. At first, you may not notice anything—but over time, that lack of support leads to sinking, cracking, and uneven concrete.
Left untreated, it turns into a bigger repair.
But here’s the good news:
You don’t need to replace your concrete to fix the problem underneath.
At Granite City Concrete Raising, we use polyurethane foam to fill voids and stabilize the soil—helping prevent future settling and keeping your concrete supported.
Concrete got you trippin? Get even with it!!
Why Voids Form Under Concrete
Concrete depends on solid, stable soil underneath. When that support is compromised, empty spaces begin to form.
Common causes include:
- Soil washout from rain or poor drainage
- Water erosion around driveways, patios, and foundations
- Freeze and thaw cycles shifting the ground
- Poor compaction during installation
- Leaking downspouts or water runoff issues
Once a void forms, the concrete above it is at risk of sinking or cracking.
If you’re dealing with voids, you may already be seeing issues like sinking slabs or uneven surfaces. We also provide driveway leveling and garage floor leveling to restore those areas and keep your concrete safe and stable.
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Signs You May Have Voids Under Your Concrete
Voids aren’t always visible right away, but there are clear warning signs:
- Concrete that sounds hollow when you walk on it
- Cracks forming without a clear cause
- Sections of concrete beginning to sink
- Water pooling or draining underneath slabs
- Gaps forming along edges or joints
- Uneven surfaces developing over time
If you notice these signs, it’s best to address the issue early before the damage spreads.
Our Fix: Void Filling with Polyurethane Foam
We don’t just treat the surface—we fix the problem below it.
Our void filling process uses high-density polyurethane foam to fill empty spaces and stabilize the soil beneath your concrete.
1. Drill
We drill small, discreet holes in the concrete to access the void below.
2. Fill & Stabilize
We inject expanding polyurethane foam to fill the empty space and strengthen the base.
3. Patch
We patch the holes cleanly, leaving your concrete supported and secure.
That’s it—no demo, no heavy equipment, and no long wait times.
Most projects are completed quickly, and your concrete is ready to use immediately after we’re done.
Why Homeowners and Businesses Choose Void Filling
- Prevents future sinking and slab movement
- Strengthens the soil beneath your concrete
- Costs far less than replacing damaged concrete
- Fast, clean, and minimally disruptive process
- Helps extend the life of your existing concrete
- Works for both residential and commercial surfaces
- Stops small problems from becoming major repairs
A Smarter, Simpler Way to Fix Your Concrete
We know you don’t want a long, messy, expensive project.
You just want the problem fixed—and fixed right.
That’s exactly what we focus on.
Instead of tearing out and replacing your concrete, we lift and stabilize what you already have. This saves time, reduces disruption, and avoids the high cost of full replacement.
Here’s what you can expect when you work with us:
- Clear communication from start to finish
- Honest recommendations—no upsells or pressure
- Clean, professional work with minimal disruption
- A faster, more cost-effective solution than replacement
Most projects are completed quickly, and your concrete is ready to use immediately after the work is done.
Fix the Problem Under Your Concrete
(Backed by a 10-Year Warranty)
Don’t wait until voids lead to bigger damage.
We make it fast, simple, and built to last—every project is backed by our 10-year warranty.
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Void Filling FAQ
A void is an empty space that forms beneath a concrete slab when the soil underneath shifts, settles, or washes away. Without proper support, the concrete above it can begin to crack or sink.
We use expanding polyurethane foam that is injected beneath the slab. The foam fills the empty space, stabilizes the soil, and provides strong support to prevent further movement.
Yes. By filling the empty space and strengthening the base, void filling helps reduce the risk of future settling. It addresses the root cause rather than just the surface issue.
If your concrete is already uneven or sinking, lifting may be needed along with void filling. For surfaces like driveways or garage floors, we often combine both solutions.
No. The process is clean and controlled. We drill small holes, inject the foam, and patch the surface. There’s minimal disruption compared to full concrete replacement.
Most jobs are completed quickly, and your concrete is ready to use immediately after the work is finished.
In many cases, yes. It’s faster, more affordable, and addresses the underlying problem without tearing out the existing concrete.
Yes. Void filling is commonly used for both residential and commercial applications, including areas like warehouse floors and other high-traffic surfaces.
Proudly Serving St. Cloud & Surrounding Areas
Granite City Concrete Raising provides concrete lifting, leveling, and repair services across Central Minnesota. Based near St. Cloud, we work with homeowners and businesses throughout the region to fix uneven, sinking concrete quickly and cleanly.
Whether you’re dealing with a sunken driveway, uneven sidewalk, or settling garage floor, our team is ready to help—without the cost and hassle of full replacement.
We proudly serve:
- St. Cloud, MN
- Sauk Rapids, MN
- Sartell, MN
- Waite Park, MN
- Rice, MN
- Foley, MN
- Little Falls, MN
- Brainerd, MN
- Cold Spring, MN
- Richmond, MN
- Clearwater, MN
- Monticello, MN
- Elk River, MN
- Becker, MN
- Buffalo, MN
- St. Michael, MN
- Albertville, MN
- Princeton, MN
- Milaca, MN
- Annandale, MN
We also travel throughout surrounding counties including Stearns, Benton, Sherburne, Morrison, Crow Wing, and Wright County.
Not sure if you’re in our service area? Just reach out. If it’s a larger project, we’re often able to travel even further.
Stop trip hazards before someone gets hurt.
Fix your concrete the smart way. No replacement. No stress. Just solid, level results that last.
🖂 ddierkes@gcconcreteraising.com
Hours:
Mon–Fri: 7:00 AM – 7:00 PM
Sat: 8:00 AM – 4:00 PM
Sun: Closed
Granite City Concrete Raising
Concrete Lifting & Leveling in St. Cloud, MN & Surrounding Areas
Concrete got you trippin? Get even with it!!
We help homeowners and businesses fix uneven, sinking concrete without the cost of replacement. Our polyurethane foam lifting process is fast, clean, and built to last.
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