STL Polyjack is a top-rated Sinkhole repair services company in St. Louis. We use polyjacking and compaction grouting processes to repair sinkholes. Once you contact our sinkhole filling team, they would do a thorough Ground Penetration Radar (GPR) test to determine the cause and the extent of the sinkhole in your place. Then begins the process of repairing the sinkholes. As stated before, the earlier the detection the easier and cheaper it is to repair.