Voids beneath concrete slabs are one of the leading causes of concrete settlement — and in Charleston's sandy, high-moisture coastal soil, they form faster than most homeowners realize. Water erosion, soil compaction, and shifting ground conditions create hollow spaces beneath your driveways, sidewalks, garage floors, and patios. Left unfilled, those voids grow until the slab above them sinks, cracks, or collapses. Void filling with polyurethane foam stops that process before it becomes a much larger repair.
Most jobs are completed in hours — not days. Your concrete is ready to use the same day.
Polyurethane lifting costs significantly less than tearing out and replacing existing concrete.
High-density polyurethane foam only—cleaner, faster, and longer-lasting.
We identify void locations using probing and visual inspection, then drill small access holes through the slab at the void points. High-density polyurethane foam is injected beneath the concrete, expanding to completely fill the void and compact the surrounding soil. The foam cures in minutes, providing a solid, waterproof foundation. Access holes are patched and the slab is immediately stable.
Our top priority is customer satisfaction and we work closely with clients to understand their unique needs and goals.
Small holes, precise lift—we restore your concrete to grade without over-lifting or damaging surrounding surfaces.
Polyurethane foam cures in 15–30 minutes. Most jobs are done and usable the same day we arrive.
We work in Charleston's unique coastal soil every week and understand exactly what causes concrete to settle here.
Common signs include a hollow sound when you tap on the concrete, slight flexing or movement underfoot, unexplained cracking, or visible gaps at slab edges. The only way to confirm and map voids accurately is with a professional inspection — we provide these as part of our free estimate.
Polyurethane foam is lightweight (unlike concrete grout, which adds significant load to already compromised soil), waterproof, and expands to completely fill irregular void shapes. It will not erode or wash away over time the way cement-based slurries can.
Contact Gator Concrete Lifting for a free, no-obligation estimate. Most jobs are done the same day.
