Concrete Lifting Services: Frequently Asked Questions

What is foam concrete lifting and how is it different from mudjacking?

Foam concrete lifting uses an expanding polyurethane foam that is injected beneath sunken concrete slabs to raise and stabilize them. Unlike old-fashioned mudjacking, which uses a heavy cement slurry that can add weight and break down over time, polyurethane foam is lightweight, incredibly durable, and water resistant. It fills voids more completely and the lifted surface can typically be used again within just 15 to 30 minutes — making it a far superior solution for homeowners.

What surfaces can be lifted or leveled with foam concrete lifting?

The Crack Guys can lift and level a wide variety of concrete surfaces including driveways, sidewalks, patios, garage floors, pool decks, steps, and concrete slabs. If your concrete has sunk, shifted, or become uneven, foam lifting is likely a viable solution. Our team will evaluate your specific surface during a free on-site inspection to confirm the best approach.

Why does concrete sink or become uneven in the first place?

Concrete sinks when the soil beneath it shifts, erodes, or compresses over time. Common causes include poor drainage, soil erosion from water intrusion, tree root activity, and natural settling of the ground. Once the soil beneath a slab loses its ability to support the weight above it, the concrete begins to sink and become uneven. Foam lifting addresses this by filling the voids and restoring a stable base beneath the slab.

How does the foam concrete lifting process work?

Our process begins with a thorough evaluation of the sunken or uneven concrete area. We then drill small strategic holes into the affected slab and inject specialized expanding polyurethane foam beneath it. As the foam expands it fills voids, stabilizes the soil, and lifts the concrete back to its proper level. The drilled holes are then neatly sealed, leaving a smooth, clean surface. The entire process is fast, minimally invasive, and the concrete is typically ready for use within 15 to 30 minutes.

Is foam concrete lifting a permanent solution?

Yes — polyurethane foam is extremely durable and does not break down or wash away over time the way traditional mudjacking materials can. When the underlying cause of the sinking is also addressed, foam concrete lifting provides a long-lasting result. The Crack Guys will assess your specific situation and advise you on any additional steps needed to ensure the best long-term outcome.

How long does foam concrete lifting take?

Most foam concrete lifting jobs can be completed in just a few hours depending on the size and number of areas being treated. One of the biggest advantages of this method is that the lifted concrete can usually be used again within 15 to 30 minutes after the process is complete — far faster than concrete replacement, which requires days of curing time.

Is it better to lift my concrete or replace it entirely?

In many cases foam concrete lifting is a more cost-effective and less disruptive alternative to full concrete replacement. If the slab itself is structurally sound but has simply sunk or shifted, lifting is usually the better option. However if the concrete is severely cracked, crumbling, or deteriorated beyond repair, replacement may be necessary. The Crack Guys will give you an honest assessment during your free inspection so you can make the most informed decision.

Does The Crack Guys offer free concrete lifting inspections?

Yes! The Crack Guys offers free on-site inspections for homeowners in Alabama and Tennessee. One of our experienced consultants will visit your property, evaluate your sunken or uneven concrete, and walk you through the best available lifting and leveling options. There is no obligation to proceed and no cost to you for the inspection.