Moving a kitchen island, adding a bathroom or rerouting plumbing often means cutting into the concrete slab beneath a home. That slab may look like solid concrete, but it can hold reinforcing steel, post-tension cables, electrical conduits and plumbing lines, and there may be voids beneath it. Knowing what’s there before the saw comes out helps protect the home, the crew and the project budget.
Common Renovations That Involve Concrete
Many everyday home projects require drilling, cutting, coring or trenching through a slab, including:
Relocating kitchen islands and plumbing fixtures
Installing new bathroom drains
Cutting trenches for electrical or plumbing upgrades
Garage conversions and home additions
Installing anchors and structural connections
Each of these involves penetrating concrete that may contain hidden features, and the risks are easy to underestimate when the surface looks uniform.
What Could Be Hiding in Your Slab
Many residential foundations use post-tensioned concrete. These steel tendons are placed under significant tension and can present serious hazards if they’re accidentally cut or damaged. Reinforcing steel is also embedded throughout floors and foundations, and some slabs contain electrical conduits or plumbing lines that could be struck during demolition or trenching.
Below the concrete, voids can develop from soil settlement, erosion or water intrusion. These conditions can contribute to uneven support and may be associated with cracking or movement, which makes them worth investigating before any foundation or slab work begins.
How Residential Concrete Scanning Works
OmniVueNDT uses Ground Penetrating Radar (GPR) to scan accessible concrete surfaces. The equipment transmits electromagnetic signals into the concrete and analyzes the reflected responses to identify embedded objects and potential anomalies. The scan is non-destructive, so no drilling, cutting or removal of concrete is needed to collect the data.
Detection depends on factors such as concrete thickness, reinforcement density, moisture and access, and no scan can guarantee that every embedded feature will be found. That’s why scanning works best as part of careful project planning, before work begins rather than after a problem appears. For a real-world example, see our case study on residential as-built floor and foundation mapping ahead of a home renovation.
What to Expect on the Day
A residential scan follows a straightforward process.
It starts with a conversation about your renovation, foundation concern or planned concrete modification, so we understand the objectives and which areas need investigating. On site, our field technicians scan the accessible concrete surfaces with GPR equipment and collect the subsurface data. We then interpret the radar responses to identify reinforcement, embedded utilities, potential voids and other relevant anomalies.
Where appropriate, the features we identify are marked directly on the concrete so your contractor can see where potential obstructions are. Additional documentation can be discussed depending on what the project requires. From there, our findings help your contractor or engineer evaluate the hazards and plan the next steps before any drilling, cutting or structural work begins.
Questions Homeowners Ask
Will scanning damage my floors or foundation? No. GPR scanning is non-destructive. The equipment works from the accessible surface, with no drilling, cutting or removal of concrete needed during the scan.
How long does it take? It depends on the size of the area, how accessible it is, how the concrete was built and how complex the embedded features are. Small, accessible areas may need only a short site visit, while larger or more complex investigations take longer.
Can scanning tell me whether my foundation is sound? GPR provides information about detectable embedded features and subsurface anomalies, but it doesn’t establish on its own whether a foundation is structurally adequate. A qualified structural engineer evaluates structural concerns using the scanning results alongside other appropriate evidence.
Who It’s For
OmniVueNDT works with homeowners, general contractors, plumbers, remodeling specialists, foundation repair companies and structural engineers in the Houston and Dallas areas. Whether the project is a bathroom remodel, a slab plumbing repair or a foundation investigation, our team of engineers, geophysicists, geologists and experienced field technicians can help you understand what’s beneath the surface.
Planning a project that involves cutting into concrete? Call OmniVueNDT at 1-800-605-9735 or request an estimate before work begins.