To detect underground voids, SlabJackingofMaine.com uses a Ground Penetrating Radar (GPR). GPR uses a high-frequency radar antenna and advanced signal software to accurately locate underground structures, voids, and objects. GPR is also used for the inspection of concrete walls, structures, and slab on grade to detect embedded utilities, conduit, PVC, rebar, and tension cables. This allows for accurate diagnosis of concrete problems with time and money-saving assessments prior to construction and alteration of existing concrete. This helps contractors avoid costly and potentially dangerous mistakes, like cutting utilities or rebar.