What is GPR?

GPR stands for Ground-Penetrating Radar. GPR works much like regular radar, using pulses of electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and reading the reflected signal to detect subsurface structures and objects without drilling, probing or otherwise breaking the ground surface. Applications include locating buried voids/cavities, underground storage tanks, sewers, buried foundations, ancient landfills. It can also be used to characterize bedrock, the internal structure of floors/walls, water damage in concrete, and the internal steelwork in concrete.