GPR Scanning for Concrete

You’re about to cut or core into a slab, but nobody onsite can tell you what is actually inside it.

Could be post-tension cables. Could be conduit. Could be dense rebar. Could be a void right where the cut is planned.

If you hit the wrong thing, the problem is bigger than patching concrete.

Now the job stops.

Crews are waiting. Structural concerns get raised. The schedule slips while everyone figures out how bad the damage is and what needs to be repaired.

That is where concrete GPR scanning comes in.

Before you cut. Before you core. Before the first hole goes in.

What Does This Cost?

Most concrete GPR scanning jobs run $995–$1,200 for a half day.

Larger or more complex projects typically start at $1,800+ for full-day work.

Small targeted scans may also be handled at $200/hr with a 2-hour minimum.

Same-day or next-day mobilization is available in most cases.

Most jobs are completed onsite within a few hours, with markings provided immediately so crews can proceed safely.

What Affects the Price?

Pricing depends on slab conditions and how much area needs to be verified.

A few simple core locations in an open slab are very different from scanning a congested PT deck with multiple utilities and heavy reinforcement.

Other factors include:

Slab thickness
Density of rebar or PT cables
Number of cut or core locations
Accessibility onsite
Interior versus open-area scanning
Unknown or undocumented slab conditions
The tighter the reinforcement and the higher the risk, the more verification work is usually required before cutting starts.

What You’re Actually Paying For

You are paying for visibility before concrete gets cut open.

GPR scanning helps identify embedded hazards including post-tension cables, conduit, rebar, voids, and unknown utilities.

It also gives crews clearly marked safe cutting and coring zones before work begins.

One bad cut can shut the project down immediately.

Now the crew is waiting while structural engineers, electricians, or utility owners get pulled into the problem.

That downtime costs far more than the scan.

You are not paying for a report.

You are paying to avoid damage, delays, shutdowns, and rework.

It is also important to understand that 811 does not apply here.

811 does not mark inside slabs, elevated decks, interior concrete, or embedded utilities.

SiteTwin works where 811 does not reach and where verification is required before drilling or cutting.

What Happens Onsite?

A technician uses ground penetrating radar to scan the slab live onsite.

Scanning is performed in real time with hazards and safe zones marked directly onto the concrete surface as the work progresses.

Your crew sees the results immediately.

You may see PT cable markings, conduit paths, reinforcement congestion, void indications, and adjusted cut locations marked directly on the slab.

Safe drill and cut zones can be adjusted onsite before coring or saw cutting begins.

That means field decisions happen immediately instead of waiting on delayed reports or assumptions.

Typical Scheduling

Same-day or next-day mobilization is available in most cases.

Most jobs take between 2–5 hours onsite depending on slab conditions and scan area size.

Results are marked immediately onsite so crews can proceed as soon as scanning is complete.

When You Need This

Before cutting, coring, drilling, or trenching into concrete
On post-tension slabs where mistakes are expensive
When slab conditions are unknown or undocumented
On remodels and interior work
Near slab edges, structural beams, or sensitive areas
Anytime the risk of hitting embedded utilities or PT cables is too high to guess
Scan Before You Cut
Before you cut concrete blind, get it scanned first.

One missed PT cable or conduit run can stop the job immediately.

Send the address and scope and get it scheduled before cutting starts.

Related Services
Utility Locating Services
GPR Scanning Services

If you are about to core or cut into concrete without knowing what is inside the slab, do not take the risk.

Get it scanned, marked, and cleared so your crew can cut safely and keep production moving.

Schedule Concrete Scanning
Send Address + Scope Here

For more excavation risk, concrete scanning, and underground infrastructure content, check out the The Damage Report Newsletter