Uneven sidewalks, sunken driveways, and sloped patios are more than just eyesores—they can be tripping hazards, drainage nightmares, and early warnings of deeper issues. Concrete leveling is a fast, cost-effective fix. But if you’re like most homeowners, you’ve got questions.
At Perma-Seal, we specialize in polyurethane concrete lifting (also called PolyLevel®), and we’ve heard it all. So, here are the answers to the most common questions we receive about concrete leveling.
Q. How long does concrete leveling last?
If done correctly with modern polyurethane foam, concrete leveling can last for decades. Unlike outdated methods like mudjacking, polyurethane foam is waterproof, doesn’t erode, and maintains its shape even under heavy loads.
Perma-Seal uses high-density polyurethane that cures in minutes and provides long-term support. Most of our projects come with a warranty, giving you peace of mind.
Q. Can concrete leveling fix cracked concrete?
It depends on the crack.
- Hairline or surface cracks caused by uneven settlement are often fixed during the leveling process.
- Structural cracks (deep or widespread) may require additional repair or slab replacement.
Concrete leveling won’t “heal” cracks, but it can prevent them from worsening and improve the slab’s appearance. We often recommend sealing the cracks after leveling to keep water out.
Q. What’s the Difference Between Mudjacking and Polyurethane Leveling?
While both methods aim to lift sunken concrete, polyurethane foam leveling (like Perma-Seal’s system) outperforms traditional mudjacking in nearly every way. Mudjacking relies on a heavy slurry of mud, sand, and cement that requires large injection holes, adds weight to already unstable soils, and can erode over time. In contrast, polyurethane leveling uses a lightweight, high-density foam that expands beneath the slab, filling voids and lifting concrete with precision. It cures in just 1-2 hours, requires minimal drilling, and resists water intrusion and soil erosion long-term. For a deeper comparison of the two methods, check out our full article on Mudjacking vs. Polyurethane Concrete Lifting
Q. Is concrete leveling safe for my home?
Absolutely. Concrete leveling is non-invasive and typically completed in a few hours. It involves drilling small holes, injecting the foam beneath the slab, and watching it rise back into place—all without disturbing your landscaping or existing structures.
Q. Will the foam wash away or break down over time?
No. Polyurethane foam is closed-cell, meaning it doesn’t absorb water. It’s also engineered to resist chemical breakdown, erosion, and compression. In fact, it’s the same type of foam used in airport runways and highways.
Q. What areas of my property can be leveled?
Perma-Seal can lift a variety of concrete surfaces, including:
- Driveways
- Sidewalks
- Patios & porches
- Garage floors
- Pool decks
- Basement slabs
If you have a slab that’s uneven, sunken, or dangerous—there’s a strong chance we can fix it.
Q. How much does concrete leveling cost?
Concrete leveling is usually 30%–50% cheaper than full replacement, and most projects fall between $1000–$2,000+, depending on size and complexity. Larger or multi-slab projects may cost more.
Free inspections and estimates are available through Perma-Seal to help you understand your options.
Q. Does the process require permits?
In most cases, no permits are required for residential concrete leveling. However, if the work is on public sidewalks or right-of-way areas, municipal permits may be needed. Don’t worry—we’ll handle that for you.
Q. How soon can I use my concrete after leveling?
With polyurethane foam, most surfaces are ready for foot traffic in 30 minutes and vehicle traffic in 1–2 hours. That’s one of the biggest advantages over traditional mudjacking or full slab replacement.
Q. How soon can I use my concrete after leveling?
With polyurethane foam, most surfaces are ready for foot traffic in 30 minutes and vehicle traffic in 1–2 hours. That’s one of the biggest advantages over traditional mudjacking or full slab replacement.
Is Concrete Leveling Right for You?
If your concrete is sunken, uneven, or creating a hazard, don’t wait. The longer you leave it, the worse it can get—and the more costly it can become. Perma-Seal’s concrete leveling service is fast, durable, and designed for Chicago homeowners.
Contact Us To Schedule Your Free Concrete Leveling Estimate
Schedule your free concrete leveling estimate today with Perma-Seal. Our experts will assess your situation and provide honest recommendations tailored to your home.
Call 800-421-7325 or click the button below to fill out our online contact form.