We use a product called PolyPier® (a division of ECP). It provides a new, state-of-the-art solution to a very old problem: sinking or settling concrete. Virtually every type of concrete flatwork will be susceptible to sinking if the supporting soil is loose, weak or prone to compression. Concrete will also sink when support soil is no longer there. PolyPier® is our product of choice for void filling after a pier lift is done. This provides additional support between the soil and the property's foundation base, therefore decreasing the potential for future settling.