Concrete Leveling

Sunken concrete is not just ugly. It is a trip hazard, a drainage problem, and it gets worse every year. Traditional repair means tearing out and repouring, which costs 3-5x more than leveling and takes days of disruption. Polyurethane foam leveling fixes it in hours.

We drill small, penny-sized holes in the slab and inject high-density polyurethane foam underneath. The foam expands to fill voids and gently lifts the concrete back to its original level. The holes are patched, and the surface is ready for use immediately.

The foam is lightweight and water-resistant, and it can fill voids under suitable slabs. Unlike mudjacking, polyurethane does not add as much weight under the slab.

Sunken concrete is more than a cosmetic issue. Uneven sidewalks create trip hazards that can result in serious injuries and liability. Driveways that slope toward the garage direct water into your home. Patios that collect water become mosquito breeding grounds. And sunken concrete near the foundation can channel water toward your basement walls.

Polyurethane foam leveling has largely replaced mudjacking as the preferred method. Mudjacking uses a heavy cement-slurry mixture that adds significant weight to the soil below, often the same soil that could not support the slab in the first place. Polyurethane foam is lightweight, water-resistant, and will not wash out or erode over time.

The leveling process is straightforward. Small holes (about 5/8 inch) are drilled through the sunken slab at strategic locations. Injection ports are inserted, and high-density polyurethane foam is pumped beneath the slab. As the foam expands, it fills voids and exerts lifting force. The technician monitors the slab level in real-time.

The foam reaches 90% of its final strength within 15 minutes, meaning the surface is walkable almost immediately and can bear vehicle traffic within 30 minutes. The drill holes are patched with a color-matched grout, leaving small circles that are far less conspicuous than the damage caused by demolition and repouring.

Not all sunken concrete is a good candidate for leveling. Slabs that have fractured into many small pieces, slabs with severe surface spalling, or slabs where the underlying soil issue has not been addressed may need replacement. An inspection can determine the right approach for your specific situation.

Common applications for polyurethane leveling include driveway approaches, sidewalks, front stoops, patio slabs, garage floors, pool decks, and interior slab floors. For foundation-related concrete issues like a heaving basement floor, a foundation inspection should accompany the leveling assessment.

The cost of concrete leveling depends on the square footage of the affected area, the number of injection points required, the size of voids beneath the slab, and whether soil stabilization is needed alongside the leveling. Most residential projects in the Shoals area range from $1,000 to $4,000.

Soil conditions play a major role in why concrete settles. Expansive clay soil beneath a slab can shrink during drought, creating voids. Water erosion from poor drainage can wash away supporting soil. Buried organic material like tree roots or old stumps can decompose and leave gaps. Leveling addresses the symptom (sunken concrete), but the underlying soil issue should also be evaluated.

Timing depends on access, slab condition, and project size, but most residential leveling jobs are completed in a single day. There is no curing time, no heavy equipment tearing up your yard, and no disruption to your daily routine.

One of the most common causes of concrete settlement in the Shoals area is the expansive clay soil beneath the slab. During dry periods, the clay shrinks and pulls away from the bottom of the slab, creating a void. When weight is applied to the slab above a void, it cracks and sinks. Polyurethane foam filling eliminates these voids and provides a stable, lightweight base that does not shrink or wash away.

The color match of the patched drill holes is a detail that matters for visible surfaces like front porches and pool decks. A good technician will blend the grout color to match the surrounding concrete as closely as possible. The patched holes will be visible as small circles, but they should be subtle and unobtrusive. If a contractor dismisses the patch appearance, it is a red flag.

For larger concrete surfaces like driveways and patios, leveling can be combined with joint sealing and crack filling to create a comprehensive repair. Joints between slabs should be sealed with a flexible polyurethane sealant to prevent water infiltration. Cracks should be routed and sealed similarly. Together, leveling, joint sealing, and crack filling can add years of life to concrete that would otherwise need replacement.

Concrete leveling is also used for interior applications. Sunken garage floors, basement floors, and warehouse or shop floors can all be leveled using the same polyurethane injection process. Interior work requires slightly more care to manage dust and fumes, but the process is equally effective. For basement floors that have settled due to foundation issues, leveling should only be done after the underlying foundation problem has been addressed.