- Save Thousands vs. Concrete Replacement
- Stop Water Pooling & Drainage Issues
- Long-Lasting Concrete Stabilization
- Local, Hands-On Concrete Experts
- 7-Year Warranty on Qualifying Jobs
- Save Thousands vs. Concrete Replacement
- Stop Water Pooling & Drainage Issues
- Long-Lasting Concrete Stabilization
- Local, Hands-On Concrete Experts
- 7-Year Warranty on Qualifying Jobs
Empty Space Under Your Concrete? Fix It Before It Sinks
You might not see the problem yet—but it’s there.
If you hear a hollow sound when you tap on your concrete, or you know soil has washed out underneath, that means there’s empty space below the slab.
That space will eventually cause the concrete to crack, sink, or break.
Most people don’t notice it until the damage is already done.
The good news? You can fix it early—before it turns into a bigger repair.
Why Voids Form Under Concrete
Concrete needs solid support underneath it. When that support disappears, problems start.
Voids can form because of:
- Water washing out soil below the slab
- Poor compaction when the concrete was installed
- Drainage issues around the property
- Soil erosion over time
- Freeze-thaw cycles causing ground movement
Once a void forms, the slab is left unsupported—and it’s only a matter of time before it drops.
Voids don’t usually happen in just one spot.
If there’s empty space under one slab, it’s common to see similar issues in nearby areas like driveways, garage floors, or walkways and sidewalks.
In larger or more advanced cases, soil stabilization may also be needed to fully support the area.
Catching it early helps prevent sinking and keeps your concrete stable.
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Dealing with sinking or uneven concrete? We make it simple to get answers.
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Signs There’s a Void Under Your Concrete
Voids aren’t always obvious, but there are signs to watch for:
- A hollow sound when tapping on concrete
- Areas that feel weak or unstable
- Small cracks starting to form
- Sections that look like they may drop soon
- Soil erosion around the edges of the slab
These are early warning signs that the support underneath is failing.
Polyjacking: A Better Way to Fix Your Concrete
At Summit Pro Concrete Solutions, we lift and level your existing driveway using polyurethane foam. This concrete leveling process (also called polyjacking) works from below the surface to fix the real problem.
Step 1: Inspect & Drill
- Identify the problem areas underneath the slab
- Drill small, strategic holes to access below
Step 2: Lift & Stabilize
- Inject high-density poly foam under the concrete
- Lift the slab and fill empty space
- Stabilize the base to help prevent future sinking
Step 3: Patch & Finish
- Patch the small drill holes
- Clean the area
- Concrete is ready to use the same day in most cases
Concrete Lifting vs. Replacement
Most people assume replacing concrete is the only way to fix the problem—until they realize what that actually involves.
Here’s how the two options really compare:
Concrete Replacement
- Higher cost (often double or more)
- Takes days—or even weeks—to complete
- Loud, messy demolition and disruption
- New concrete can sink again if the soil isn’t fixed
Concrete Lifting (Polyjacking)
- Typically done in just a few hours
- Ready to use the same day
- Clean process with small drill holes
- Lifts your existing concrete and fixes the problem underneath
If your concrete is still in good condition, lifting is almost always the faster, cleaner, and more cost-effective way to fix it.
This Problem Gets Worse Over Time
Empty space under concrete doesn’t stay the same.
Voids are usually caused by soil washing out or settling beneath the slab—and once that support is gone, the problem continues to grow.
Over time:
- The void gets larger
- The slab weakens
- Cracks begin to form or spread
- More sections lose support
- The concrete eventually sinks
As the void expands, the slab has less and less support—making the surface more unstable and increasing the risk of sudden settling.
Many homeowners wait until the slab drops—but by then, the repair is larger than it needed to be.
Fixing voids early is faster, easier, and more cost-effective.
What You Get When It’s Fixed the Right Way
Fixing uneven concrete isn’t just about appearance—it’s about stopping the problem at the source.
When the job is done right, you get:
- Concrete ready to use the same day in most cases
- Lower cost compared to full replacement
- Stabilized support that helps prevent future sinking
- Voids filled and the slab reinforced from below
- A clean repair with small, low-visibility drill holes
This isn’t a temporary patch—it’s a long-term fix that addresses the problem underneath.
Fix it once. Fix it right.
Why Choose Summit Pro
When you call Summit Pro, you’re working directly with Brian Mrksich—not a sales team. That means you get real answers, honest guidance, and a clear plan to fix your concrete the right way.
We don’t overcomplicate things. We focus on solving the problem under your concrete so it stays level and doesn’t keep getting worse.
What You Can Expect
- Clear answers about what’s going on
- Honest pricing with no surprises
- No pressure to upsell anything you don’t need
- Clean, controlled work with small drill holes
- Most jobs done in a few hours
- Minimal disruption to your home or business
- Concrete ready to use the same day
- 7-year warranty on qualifying jobs
From the first call to the final lift, everything is straightforward. We show up, explain the issue, and fix it the right way—without dragging the job out or creating a mess.
You get a level, stable surface and a solution you don’t have to think about again.
Void Filling FAQ
Void filling is the process of filling empty space under concrete using expanding foam. This restores support to the slab and helps prevent it from sinking or cracking.
Common signs include a hollow sound when tapping the surface, small cracks forming, or areas that feel weak. If you’re unsure, we can take a look and confirm.
Yes. Filling the empty space under the slab helps stabilize it and reduces the risk of future sinking.
Void filling is often part of the lifting process. If the slab hasn’t sunk yet, we may only need to fill the space. If it has already dropped, we combine filling with lifting.
Most void filling jobs can be completed in a few hours, depending on the size of the area.
In most cases, the concrete is ready to use the same day after the foam has set.
Yes. The foam expands and hardens to create a strong, stable base under the slab.
The holes are small (about the size of a dime) and are patched after the job. They blend in over time.
If the slab has already dropped, we may recommend concrete slab leveling or another lifting service to bring it back to level.
No. You can send photos, and we can often provide a quote without an in-person visit.
7-Year Warranty. No Guesswork.
Concrete Lifting & Repair Across the Denver Area
Summit Pro Concrete Solutions proudly serves homeowners, businesses, and property managers across Denver and surrounding communities. Whether you’re dealing with a sinking driveway, uneven sidewalk, or large commercial slab, we’re ready to help.
We travel throughout the region to provide fast, reliable concrete lifting and repair services.
Cities We Serve
- Denver
- Colorado Springs
- Aurora
- Centennial
- Castle Rock
- Castle Pines
- Parker
- Highlands Ranch
- Littleton
- Lone Tree
- Greenwood Village
- Monument
- Elizabeth
- Franktown
And many surrounding areas within about a 75-mile radius. If you’re nearby but don’t see your city listed, just reach out.
Sinking concrete getting worse? Fix it before it spreads.
A small fix today prevents a bigger repair tomorrow
Hours:
Mon–Fri: 8:00 AM – 6:00 PM
Sat: 8:00 AM – 12:00 PM
Sun: Closed
Serving Denver and surrounding areas including Colorado Springs, Aurora, Centennial, Castle Rock, Parker, Highlands Ranch, Littleton, and more.
Summit Pro Concrete Solutions
We help homeowners and businesses fix sinking, uneven concrete without replacing it. Using polyurethane foam lifting, we raise and stabilize your concrete fast, clean, and with long-lasting results.
From driveways and sidewalks to warehouse floors and parking lots, we focus on one thing—fixing the problem the right way so it lasts.
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