Sunken concrete isn’t just an eyesore — it’s a safety hazard. Uneven sidewalks, driveways, patios, and garage floors can cause trips, pooling water, and even structural issues if left unaddressed. Fortunately, there’s a modern, cost-effective solution that doesn’t require tearing out and replacing your concrete: polyurethane foam lifting, also known as slabjacking.
Let’s break down how it works and why it’s one of the best solutions available today.
What Causes Concrete to Sink?
Concrete slabs are only as stable as the soil beneath them. Over time, several factors can cause that soil to shift or wash away:
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Poor soil compaction during construction
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Water erosion from rain or drainage issues
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Freeze-thaw cycles
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Plumbing leaks beneath slabs
When the soil underneath settles or erodes, the concrete above it loses support and begins to sink or crack.
What Is Polyurethane Foam?
Polyurethane is a high-density, lightweight expanding foam material. When injected beneath a concrete slab, it reacts and expands, filling empty spaces in the soil and lifting the concrete back to its original level.
Here’s what makes it so effective:
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Lightweight but strong – It adds minimal weight to the soil while providing powerful lifting support.
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Fast-expanding – The foam expands within seconds, allowing for precise lifting.
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Water-resistant – It won’t wash away or break down over time.
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Long-lasting – Once cured, it forms a stable base that helps prevent future settling.
Think of it as creating a new, solid foundation underneath your existing concrete.
How Polyurethane Foam Lifting Works
The process is surprisingly quick and minimally invasive:
- Small holes are drilled into the affected concrete slab.
- Polyurethane foam is injected beneath the surface.
- The foam expands and lifts the slab back into place.
- The holes are patched, leaving a clean, finished look.
Most projects are completed in just a few hours — and the surface is typically ready to use the same day.
Why Choose Foam Lifting Over Replacement?
Many homeowners assume replacement is the only fix. But tearing out and pouring new concrete is often:
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More expensive
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More disruptive
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Time-consuming
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Unnecessary
Polyurethane slabjacking restores your existing concrete at a fraction of the cost and time.
The Benefits at a Glance
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Eliminates trip hazards
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Improves curb appeal
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Prevents further damage
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Environmentally friendly (less demolition waste)
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Long-lasting solution
If your concrete is sinking, cracking, or uneven, acting early can prevent more costly repairs down the road.
Restore Your Concrete the Smart Way
At Sealtite Insulation & Slabjacking, we specialize in polyurethane foam lifting solutions that are fast, effective, and built to last. Our team has the experience and equipment to safely restore your concrete surfaces without the hassle of replacement.
Contact Sealtite Insulation & Slabjacking today for a free estimate and see how we can lift and level your concrete quickly and affordably.