Concrete void filling is a fast and affordable way to lift sunken concrete, restore safety, and stop further damage. Using slab stabilization foam, we fill gaps under slabs to eliminate hazards and improve durability.
If your concrete driveway, sidewalk, or porch is starting to sink or crack, chances are there’s a hidden void beneath the slab. These voids are often caused by soil erosion, poor compaction, or inadequate water drainage. It leaves space under the surface that can’t support the weight above.
Polyurethane void filling is a modern solution that uses expanding polyurethane foam to fill those hidden gaps. The polymer foam is injected through small holes drilled in the slab and expands to fill the cavity, gently lifting the concrete back to its proper level.
Not only does this foam injection under slab technique restore safety and appearance, but it also protects your concrete from future damage. With little to no excavation and curing times needed, slab void repair is one of the most efficient and cost-effective solutions available today.
Small dips or cracks in your concrete could signal a larger problem under the surface. If left untreated, it may lead to costly structural damage. If you observe the following sign, it's time to perform concrete subgrade stabilization:
Concrete sinking due to soil erosion is a widespread problem. Our concrete lifting foam lifts and supports your slabs without disruption or mess.
From cracked, sinking concrete to safe and level surfaces, see how our foam injection solution makes a visible difference fast.
Here are some of the most frequently asked questions we receive from Charlotte homeowners.
The cost to fill a void under a concrete slab typically ranges based on slab size, material used, and severity of the void. Most residential projects cost less than full replacement and are completed in one day.
High-density polyurethane foam is considered the most effective for filling voids. It expands to fill space, hardens quickly, and provides strong, water-resistant support beneath concrete.
Voids commonly result from soil erosion, poor compaction, or water runoff washing soil away. Over time, unsupported concrete sinks, cracks, or breaks apart.
Still have questions? Contact our friendly team—we’re happy to help. Or better yet:
We’re recognized throughout North Carolina for delivering reliable, long-lasting repairs with a commitment to service and customer satisfaction.
