The best method of detecting cracks or faults in a concrete slab or structures like rebar under the surface is to use a ground-penetrating radar.
The Hilti PS1000 is most suitable for detailed concrete scans. You can use it for mapping out particular sections of a slab, or the entire thing.
Here's a step-by-step guide to using the Hilti PS1000.
If you have any questions about our equipment or need advice on the best equipment to use, the team at your local Kennards Hire branch should be able to help you.