Concrete Leveling in Arkansas: How Polyurethane Foam Works

Understanding Concrete Leveling in Arkansas With Polyurethane Foam 

A sinking driveway, uneven sidewalk, or patio that slopes in the wrong direction can start as a minor inconvenience. Over time, however, uneven concrete can create trip hazards, allow water to collect where it should not, and make everyday areas around a property harder to use.

For many homeowners, concrete leveling in Arkansas can provide an alternative to removing and replacing an entire slab. One method used for lifting sunken concrete is polyjacking, which uses expanding polyurethane foam to fill spaces beneath the slab and carefully raise it back toward a more level position.

Understanding how polyurethane foam works can help homeowners recognize when concrete lifting may be appropriate and what to expect from the repair process.

Why Does Concrete Sink in Arkansas?

Concrete slabs depend on the soil beneath them for support. When that support changes, the slab can settle or shift.

Several conditions can contribute to uneven concrete, including:

• Soil erosion caused by water runoff
• Poorly compacted fill soil
• Soil consolidation over time
• Voids forming beneath the slab
• Drainage problems around the property
• Changes in ground conditions

Water deserves particular attention. When runoff repeatedly flows beneath or alongside a concrete slab, it can wash away supporting soil and leave empty spaces underneath. Once portions of the slab lose adequate support, they may begin to settle.

In Northwest Arkansas, where terrain and weather conditions can contribute to drainage and soil-related problems, homeowners may notice these issues around driveways, sidewalks, patios, pool decks, and other concrete surfaces.

What Is Polyjacking?

Polyjacking is a concrete lifting method that uses expanding polyurethane foam to raise and stabilize sunken concrete.

Instead of removing the slab, technicians drill strategically placed holes through the concrete. Specialized polyurethane foam is then injected underneath the slab. As the material expands, it fills voids and applies controlled lifting pressure to the concrete.

The process generally involves:

1. Inspecting the concrete to understand the extent of settlement.
2. Identifying injection points based on the condition and layout of the slab.
3. Drilling small access holes through the concrete.
4. Injecting polyurethane foam beneath the slab.
5. Monitoring the lift as the concrete is brought closer to the desired elevation.
6. Sealing the injection holes after the repair.

The goal is not simply to raise the concrete. The material also helps provide support beneath areas where voids have developed.

How Does Polyurethane Foam Lift Concrete?

The key to polyjacking is the expansion of the polyurethane foam after injection.

When the material is introduced beneath a sunken slab, it expands into available spaces. This expansion creates upward pressure against the underside of the concrete.

Filling Voids Beneath the Slab

A settled slab may have empty spaces beneath portions of its surface. These voids can develop when soil erodes, compresses, or moves.

Polyurethane foam can expand into these spaces, helping restore contact and support beneath the slab.

Raising the Concrete

As the foam expands, it produces lifting pressure. Technicians can control the injection process to gradually raise the slab toward the desired elevation.

This controlled approach is particularly important around areas such as steps, garage entrances, adjoining slabs, and other surfaces where excessive movement could create additional problems.

Supporting the Repaired Are

After the foam cures, it remains beneath the slab and provides support. The long-term performance of a concrete lifting repair still depends on factors such as drainage, soil conditions, the condition of the existing slab, and the cause of settlement.

Why Use Polyurethane Foam for Concrete Leveling?

Polyurethane foam offers several characteristics that make it useful for certain concrete lifting applications.

Lightweight Material

Polyurethane foam is considerably lighter than traditional cement-based lifting slurry. That can be beneficial when the existing soil has already experienced settlement or has limited bearing capacity.

Adding unnecessary weight beneath a slab is not always desirable, so the material used for lifting should be considered alongside the condition of the soil.

Small Injection Holes

Polyjacking typically requires relatively small holes drilled through the concrete. After lifting, these access points are patched.

Because the process does not require extensive excavation, it can reduce disruption to landscaping and surrounding areas compared with removing and replacing a slab.

Fast-Curing Process

Polyurethane foam can cure quickly, allowing repaired surfaces to return to use sooner than some traditional repair approaches. The exact timeline depends on the material, weather conditions, slab characteristics, and the scope of the project.

A professional assessment can provide a more accurate expectation for when a particular surface can be used again.

Minimal Surface Disruption

Concrete replacement requires demolition, removal of the existing slab, preparation of the base, new concrete placement, and curing.

Concrete lifting takes a different approach by working through access points in the existing slab. For suitable repairs, this can make the process less disruptive while preserving the majority of the original concrete.

Polyjacking vs. Replacing Sunken Concrete

Not every damaged slab should automatically be lifted. The condition of the concrete and the reason it settled should be evaluated first.

Concrete leveling may be worth considering when:

• The slab is largely intact but has settled.
• Voids have developed beneath the concrete.
• Sections of a driveway or walkway have become uneven.
• Water is pooling because the slab has changed elevation.
• The primary issue is settlement rather than widespread concrete deterioration.

Replacement may be more appropriate when:

• The slab has extensive structural deterioration.
• Large sections are severely broken apart.
• The concrete has reached the end of its useful service life.
• The underlying problem cannot be addressed through lifting alone.

A professional inspection can help determine whether lifting, replacement, or another repair approach makes the most sense.

Signs You May Need Concrete Leveling in Arkansas

Homeowners do not always notice concrete settlement immediately. Look for changes such as:

• A visible step or lip between sections of sidewalk
• Driveway sections that slope or sit at different elevations
• Gaps beneath porch steps or concrete stoops
• Water pooling on a previously level surface
• Cracks that appear alongside areas of settlement
• Uneven patio or pool deck sections
• Concrete that has pulled away from adjacent structures

These signs do not necessarily mean polyurethane injection is the right solution. They do indicate that the condition of the slab and the supporting soil may need closer attention.

Why Drainage Matters After Concrete Leveling

Lifting a slab addresses the concrete’s position, but homeowners should also consider why the settlement occurred.

If water continues to wash soil away from beneath the concrete, the underlying cause may remain.

Simple drainage improvements can include:

• Extending downspouts away from concrete and foundations
• Correcting areas where water consistently pools
• Maintaining gutters and downspouts
• Improving grading where appropriate
• Addressing drainage paths that direct water beneath slabs

For this reason, a good concrete leveling assessment should consider more than the visible height of the slab. Understanding the conditions beneath and around it can help homeowners make a more informed repair decision.

What to Expect During Concrete Leveling

A professional concrete leveling project typically begins with an evaluation of the affected area.

The technician may look at:

• How far the slab has settled
• The condition of the concrete
• Possible voids beneath the slab
• Drainage patterns
• Nearby structures and adjoining concrete
• The likely cause of settlement

Once the repair approach is determined, injection points are marked and small holes are drilled. Polyurethane foam is injected beneath the slab while the lift is monitored.

After the concrete reaches the appropriate elevation, the injection holes are patched and the work area is cleaned.

The result is a repaired surface without the need to automatically demolish and replace the entire slab.

Practical Takeaways for Arkansas Homeowners

Before deciding what to do with sunken concrete, keep these points in mind:

• Do not focus only on the crack or low spot. The supporting soil may be part of the problem.
• Check drainage. Water movement can contribute to erosion and settlement.
• Address trip hazards early. Uneven concrete can become more difficult to navigate over time.
• Compare repair options. Lifting and replacement are not interchangeable solutions for every slab.
• Have the area evaluated. A professional can determine whether the concrete is a candidate for lifting.
• Consider the cause of settlement. Correcting drainage or other contributing conditions can help protect the repair.

Get Professional Concrete Leveling in Arkansas

Sunken concrete does not always require tearing out an entire slab. When the existing concrete is suitable for lifting, polyurethane foam injection can provide a practical way to raise and support settled areas with limited surface disruption.

Smouse Bros provides concrete leveling and lifting services in Northwest Arkansas, including areas such as Fayetteville, Springdale, Rogers, and Bentonville. Homeowners dealing with uneven driveways, sidewalks, patios, garage floors, or pool decks can request an evaluation to determine whether polyjacking is an appropriate solution.

Frequently Asked Questions

What is concrete leveling?

Concrete leveling is the process of raising sunken or uneven concrete back toward a more appropriate elevation. Depending on the slab and site conditions, different lifting methods may be considered.

How does polyurethane foam work for concrete lifting?

Polyurethane foam is injected through small holes drilled in the concrete. The foam expands beneath the slab, filling available voids and creating lifting pressure that can raise the concrete.

Is polyjacking the same as mudjacking?

No. Both methods lift sunken concrete by injecting material beneath the slab, but they use different materials. Polyjacking uses expanding polyurethane foam, while traditional mudjacking uses a heavier cement-based slurry.

Can polyurethane foam fix cracked concrete?

Concrete lifting can correct settlement and improve the elevation of a slab, but it does not automatically repair every existing crack. Cracks may require separate evaluation and repair.

How long does concrete leveling last?

The longevity of a concrete lifting repair depends on several factors, including soil stability, drainage, the condition of the slab, and the cause of the original settlement. Addressing drainage and other contributing conditions can help support long-term performance.

Is concrete leveling better than replacing a slab?

It depends on the condition of the concrete. A largely intact slab with settlement may be a candidate for lifting, while severely deteriorated or extensively broken concrete may require replacement.

How quickly can concrete be used after polyjacking?

Polyurethane foam can cure quickly, but the appropriate return-to-use time varies by project. The technician should provide specific guidance based on the material, weather, slab, and repair conditions.

What types of concrete can be lifted?

Depending on site conditions, concrete lifting may be used for surfaces such as driveways, sidewalks, patios, garage floors, pool decks, and other concrete slabs.