Why Is PolyRenewal™ the Best Solution for Sinking Concrete?

For decades, civil engineers have been trying to perfect the concrete lifting process by mixing different materials with cement and pumping that mixture under the slab. Even though these various mixtures have different advantages and disadvantages, the result is always the same: A short-term solution for a sinking slab that can sometimes make the situation worse. Luckily, we live in a time where we have the tools and the materials capable of providing homeowners with a long-term solution. That solution would be PolyRenewal™, our polyurethane foam injection procedure that permanently repairs sinking slabs. It’s a contemporary concrete lifting method that doesn’t disappoint, not only because of the results, but also because of its convenience.

What makes PolyRenewal™ so great is that it doesn’t have any of the downsides that makes mudjacking such a problematic method. The cement slurry in mudjacking eventually erodes with time as the particles get displaced due to water and expanding ice. The crack formed from this displacement makes it so that water permeates past the concrete and reaches the soil, which causes settling down the line. The polyurethane foam we use is impermeable, meaning that it doesn’t erode nor does it allow moisture to seep through and saturate the soil. The same amount of polyurethane foam that is injected under the slab will stay there for decades.

Polyurethane foam is also lightweight, perfect for the soft soil in Northern North Carolina, which shifts easily under too much weight. Cement is rough and heavy, so a mudjacking job does nothing but displace the soil further. Closed-cell polyurethane foam is dense enough to support heavy loads without disrupting the soil underneath. All in all, PolyRenewal™ is the superior concrete lifting option because it does what soil and cement cannot do: Provide the slab with a foundation that will not shift or wash away.