Ground Penetrating Radar Services

Voids - Leaks - Cracks - Compaction

What is Ground Penetrating Radar?

Ground Penetrating Radar is a high-resolution electromagnetic survey technique designed to investigate anomalies in the subsurface of the earth and surrounding infrastructure. Ground penetrating radar (GPR) uses radar pulses to generate images of the subsurface. This sub-surface imaging tool uses electromagnetic energy pulses into the ground, as it moves an image of the sub-surface below is created. Ground penetrating radar is complex and how to apply the best GPR requires extensive competency.

Ground penetrating radar contractors

SSI Test, Inspect and Consult can specify different GPR units with variable frequencies to solutions that are most suitable. The versatility of GPR is diverse but there is no one universal GPR unit that can fit all requirements.

GPR surveys

Our GPR surveys can provide accurate depth estimates, identify subsurface anomalies and provide 2D and 3D imagery. Our Test, Inspect & Consult Division are specialists in this area with over 20 years experience. This includes non-destructive testing, utility mapping and surveys.

detect conductive and non-conductive pipes and ducts through ground penetrating radar

Ground penetrating radar uses in infrastructure

What is Ground Penetrating Radar used for?

GPR technology has a wide range of uses. It is used to identify and assess conditions and assets beneath the surface. It is a non-destructive way of locating assets which prevent the need to dig up the ground. This prevents a cost and time benefit to Utility providers and local authorities. Our expert team have recently used GPR technology at properties in London. We administered a GPR survey to try and identify what was causing water leakage on a high rise residential block of flats. The Ground penetrating radar survey helped us to find the location of the leak. Other methods had been tried but were not successful. With ground penetrating radar, we were able to find the problem and come up with a solution.

Ground penetrating radar uses in Road, Rail, Tunnel and Infrastructure

  • Asphalt layer surveys
  • Identification of sinkholes
  • Deterioration of base road and rail ballast
  • Subsurface structures beneath manmade objects
  • Bridge foundation/footing surveys
  • Wall anomalies and thickness
  • Subsurface tunnel anomalies
  • The quality control of repairs – real time monitoring of the injection of specialist grouts and the latest polymer resins

Ground penetrating radar for Utility Location and Mapping

GPR should be considered as a complementary survey tool for utility locating and mapping:

  • To confirm the location of a radio detection anomaly
  • Improve depth estimates
  • Detects additional features
  • Location of plastic and non ferrous pipes
  • Locating large volume and long running water leaks
  • Rapid reconnaissance surveys – due to fast data collection
  • Internal sewer inspections and surrounding soils
  • Sub Surface imaging


Comparable to some other methods, like seismic and electrical resistivity, GPR is used to map the layering of materials, water table levels, cavities and other geological phenomenon.

GPR uses in Archaeology

GPR technology has become a valuable tool for archaeological studies and surveys. It allows for a potential site to be mapped and evaluated before the actual digging – focusing the efforts and preserving underground artefacts.