How to Lift a Sinking Concrete Driveway

A sinking concrete driveway can be an eyesore and a safety hazard. It can also damage your vehicle's suspension and tires. Fortunately, there's a simple and effective solution: lifting it with polyurethane foam.

Understanding the Problem

Concrete driveways sink due to soil compaction or settling beneath the slab. Over time, the soil beneath the driveway can lose its ability to support the weight of the concrete, leading to uneven surfaces and cracks.

Why Polyurethane Foam is the Best Solution

Polyurethane foam is a lightweight, durable material that expands to fill voids and provide support. When injected beneath a sinking driveway, it effectively lifts and levels the concrete, creating a solid foundation.

Benefits of Using Polyurethane Foam

• Permanent Solution: Unlike temporary fixes like gravel or dirt, foam provides a lasting solution to sinking concrete.
• Cost-Effective: Lifting with foam is often more affordable than replacing the entire driveway.
• Minimal Disruption: The process is relatively quick and requires minimal disruption to your property.
• Environmentally Friendly: Polyurethane foam is a sustainable material that doesn't harm the environment.

Steps Involved in Lifting a Sinking Concrete Driveway

1. Preparation

• Inspect the Driveway: Identify the areas that are sinking and measure the depth of the depressions.
• Clear the Area: Remove any obstacles like landscaping, vehicles, or debris from the area where you'll be injecting foam.
• Drill Holes: Drill holes around the perimeter of the sinking area, spaced about 12-18 inches apart.

2. Foam Injection

• Inject the Foam: Use a specialized foam injection machine to insert the polyurethane foam into the drilled holes.
• Monitor Expansion: Observe the foam as it expands and fills the voids beneath the concrete.
• Allow Curing: Let the foam cure for 24-48 hours before driving on the driveway.

3. Finishing Touches

• Fill the Holes: Patch the holes with concrete or sealant once the foam has cured.
• Clean Up: Remove any excess foam and debris from the driveway.

Conclusion

Lifting a sinking concrete driveway with polyurethane foam is a simple and effective solution that can save you time, money, and headaches. By following these steps, you can restore your driveway to its original level and ensure its longevity.

Remember to consult with a professional contractor for larger projects or if you're unsure about the process. They can provide expert guidance and ensure the best possible outcome for your driveway.