Concrete Imaging & Inspection Services
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Call us at 203.312.9844 or email us at info@undergroundsurveying.com to schedule a concrete imaging or inspection survey or to learn more about our services. We currently serve Connecticut (CT), New York (NY), New Jersey (NJ), Massachusetts (MA) and Rhode Island (RI).

Our concrete imaging services can help you determine the location of rebar, post tension cables, pipes and conduits embedded within concrete structures prior to drilling, cutting or coring. In addition, our concrete inspection services can help you determine the location of voids, pinpoint deteriorating areas of concrete and perform quality control inspections of newly built or existing concrete structures. The chart on the right shows a list of some common objects we are capable of locating and their uniform color codes.

We are capable of imaging and inspecting the following concrete structures:

  • Slabs
  • Slabs-on-grade
  • Columns
  • Beams
  • Bridges
  • Towers
  • Tunnels
  • Balconies
  • Walls
  • CMU Walls

All concrete imaging and concrete inspection surveys are performed with ground penetrating radar (GPR) technology in strict adherence to a customized five step concrete imaging and inspection process. GPR technology enables our technicians to scan concrete structures with a small hand cart in real time, providing the client with immediate results. Unlike radiography (x-ray), the GPR signal is harmless, a permit is not required and an exclusion zone is not necessary. The pictures on the right show some GPR data and the transcription of that data to the surface of a post tension slab; below it are examples of some common survey design options.

We offer our clients two different levels of service. Choose the level that best fits your needs.

Level 1 – This is our least expensive and least complex level of service. A concrete imaging or inspection survey is performed; the results of the survey are marked on the surface with colored chalk, paint, marker, tape, crayon or wax pencil. A consultation is then performed with an onsite representative to discuss the results of the survey.

Level 2 – This is our most expensive, complex and time consuming level of service. First, a concrete imaging or inspection survey is performed and the results of the survey are marked on the surface with colored chalk, paint, marker, tape, crayon or wax pencil. Next, a consultation is performed with an onsite representative to discuss the results of the survey. Finally, notes and picture are taken to document the results of the survey and the information is used to create a written Concrete Imaging Survey Report (PDF).

Our concrete imaging and inspection services will enable you or your company to take advantage of the following benefits:

  • Reduce the risk of personal injury
  • Reduce the risk of damage to rebar, cables and conduits
  • Eliminate costly mid-project repairs and delays
  • Preserve the structural integrity of concrete
  • Increase the ease of drilling, cutting or coring
  • Gain peace of mind

To learn more about our concrete imaging and inspection process, please visit the concrete imaging and inspection process page.

To view some of our recently completed projects, please visit the concrete imaging and inspection projects page.


A GPR image showing the internal structures of a post tension concrete slab.
The transcription of that data to the surface of the slab, depicting the location of a post tension cable, conduit and rebar mat.