Slab profile survey
Slab profile and void scanning
Scanning is not only about avoiding strikes. GPR profiles a slab's construction (thickness, reinforcement spacing and cover) and can reveal voids beneath slabs where erosion or poor compaction has left the concrete unsupported.
Scope
What this covers
Thickness profiling across a grid over the survey area
Reinforcement spacing and cover depth reporting
Anomaly mapping where returns suggest voiding or trapped moisture
A written summary suitable for the project engineer
Timing
When it's needed
Structural engineers ask for this when assessing a building for change of use, extra load or unexplained cracking. It also settles disputes about whether a slab was poured to specification, and screens for wash-out voids around leaking pipes before they become subsidence.
Treat every unidentified object in a slab as live and every unmarked area as unscanned. If a cut nicks a conduit or a tendon, stop work, keep people clear of the slab face and get the relevant specialist on site before anything else happens.
Quote variables
What shapes the scope
Grid density the engineering question requires
Surface obstructions: fit-outs, racking, machinery over the survey area
Whether findings need a formal report or field marking suffices
Verification coring, if the engineer wants radar results confirmed
Concrete scanning is an interpretive skill, not just a piece of equipment: ask any operator about their training, their experience on your slab type and how they express confidence in their marks. For excavation work, lodge a free enquiry with Before You Dig Australia and keep the plan responses on hand; field locating complements those plans rather than replacing them.
Scanning services
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