How GPR Scanning Works
Ground Penetrating Radar uses high-frequency radio waves to create a subsurface image of your concrete — without damaging the structure.
From Scan to Results
A GPR antenna emits radio waves into concrete. When those waves hit an object or material change, they bounce back. The antenna captures those reflections and creates a profile called a radargram — a cross-sectional image of what's inside the concrete.
Scan the Surface
We move the GPR antenna systematically over the concrete surface to collect subsurface data.
Process the Data
Scan data is processed in the field and reviewed by our experienced technicians.
Interpret Findings
Targets and anomalies are identified, interpreted and their locations noted.
Deliver Results
You receive surface markings, scan images and/or a detailed report with findings.
What GPR Can & Cannot Do
GPR is powerful, but it has limitations. Here's what you can realistically expect.
GPR Can Typically Detect
Rebar location, depth and approximate spacing • Post-tension cables and ducts • Metallic and some non-metallic conduits • Voids and delamination anomalies • Slab thickness (with calibration) • Material layer changes
Limitations to Be Aware Of
GPR cannot see through metal decking • Dense or closely spaced rebar may limit depth visibility • Cannot determine rebar size precisely • Results depend on concrete composition and moisture • Not all non-metallic objects are detectable • Detection depth is typically limited to ~450mm
What You Receive
Surface Markings
Detected targets are marked directly on the concrete surface using paint or markers for field reference.
Scan Data & Images
Screenshots and images from the scan to support your project documentation and decision-making.
Summary Report
A clear written summary of findings, observations and recommendations for your records.
Ready to Scan Your Project?
Get in touch to discuss your scanning needs with our team.