Solving for Why: Detecting Voids in Slabs with Ground Penetrating Radar

Daniel E. Wetherington, Janney Technical Center Lab and Instrumentation Coordinator

Voids in the subbase below concrete slabs-on-ground are a common cause of slab cracking and other issues. Ground penetrating radar (GPR) is one technique that WJE employs to efficiently and nondestructively detect subbase voids.

In this episode of WJE's Solving for Why series, WJE technician Dan Wetherington demonstrates the use of GPR and discusses how we interpret and use the data collected.


WJE's Janney Technical Center provides a wide range of chemical, petrographic, metallurgical, environmental, and structural testing capabilities to our clients. Take a look inside our laboratories through more of our "Solving for Why" series as WJE experts walk through some of the tests we regularly perform to solve our clients' built world problems.

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