Common Myths About Concrete Repair With Polyurethane Foam

Concrete lifting has advanced dramatically in the past decade, and one of the most reliable modern solutions is polyurethane foam concrete repair. It’s fast, long-lasting, and extremely strong—yet many homeowners still hesitate because of misinformation.

If you live in South Carolina, you’ve likely seen sinking driveways, unlevel sidewalks, dipping pool decks, or settling garage slabs. Because our area has sandy coastal soils, clay inland, and high humidity, concrete movement is common. But once you know the facts, choosing the right repair method becomes easy.
Here are the most common myths about polyurethane foam concrete repair—and the real truth behind them.

Myth #1: “Polyurethane foam isn’t strong enough for heavy concrete.”
The Truth: High-density polyurethane foam is incredibly strong and is used to lift highways, bridge approaches, industrial warehouse floors, and commercial slabs. If it’s strong enough for transportation infrastructure, it’s more than strong enough for your driveway, pool deck, or sidewalk.

Myth #2: “Foam only fills voids—it doesn’t actually lift the slab.”
The Truth: Polyurethane foam does both! It expands to fill empty areas under the concrete and then exerts controlled upward pressure to lift the slab evenly. The foam also stabilizes weak soil, preventing future sinking.

Myth #3: “Polyurethane foam breaks down over time.”
The Truth: The foam is extremely durable and does not absorb water, shrink, rot, wash out, or erode. Mudjacking materials can deteriorate or wash away, but closed-cell polyurethane foam is stable and long-lasting—often outlasting the concrete itself.

Myth #4: “Foam isn’t suitable for big lifting jobs.”
The Truth: Foam is used for both small and major projects, including garage slabs, commercial walkways, warehouse floors, and pool decks. It provides precise lifting for entire slabs, even those needing several inches of adjustment.

Myth #5: “Polyurethane foam isn’t environmentally friendly.”
The Truth: The materials used for foam concrete lifting are non-toxic once cured, lightweight, and long-lasting. They reduce the need for concrete replacement, keeping old slabs out of landfills and minimizing heavy machinery on your property.

Myth #6: “Foam won’t work in South Carolina’s soil.”
The Truth: Polyurethane foam performs extremely well in our region because it doesn’t rely on soil strength to stay in place. It’s waterproof, controls soil movement, and seals voids to stop erosion—ideal for coastal areas, sandy soil, clay, and high-moisture environments.

Myth #7: “The holes drilled for foam are big and visible.”
The Truth: Injection holes for foam are tiny—about the size of a dime (⅜"). They are patched after lifting and blend in with the surrounding concrete. Most customers can’t find them afterward.

Myth #8: “Replacing concrete is cheaper than leveling it.”
The Truth: Foam lifting is typically 50–75% less expensive than replacement. Replacement requires demolition, hauling, forms, pouring new concrete, curing time, and yard repair. Foam lifting takes 1–2 hours and the slab can often be used the same day.

ConclusionPolyurethane foam concrete repair is:

• Strong
• Fast
• Clean
• Precise
• Eco-friendly
• Long-lasting
• Cost-effective

​For South Carolina homeowners dealing with sinking concrete, polyurethane foam is one of the best, most reliable solutions available today.
If you need help with concrete lifting, leveling, soil stabilization, or foundation support, Concrete Corrections is ready to help. Give us a call today 843-331-7223
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