Void Filling Concrete
Concrete settling is not the only issue polyurethane foam can solve. Voids under slabs are often present in areas where "wash out" or excessive settling have occurred. This material will weigh on average 96% less than a traditional mudjacking or cementitious grout mix, applying less stress on an already failed subgrade.
The process for void filling is the same as concrete raising: drilling, port installation, and injecting the material. All dual component polyurethane foams create heat when installed. Void fills must be done in a layering method to allow heat to dissipate safely. Remember; polyurethane foam does not shrink and is moisture resistant eliminating the 2 major reasons for voids to occur, "wash out" and material shrinkage.