See what's underground before you dig, drill, or cut.
British Columbia's most-equipped GPR (Ground Penetrating Radar) service — for underground leak detection, pre-excavation utility locating, pre-coring concrete scanning, rebar mapping, buried tank detection, and void surveys. Multi-frequency antennas from surface-rebar (1.6 GHz) to 5+ metre subsurface (200 MHz). CAD-ready deliverables. WorkSafe BC compliant damage-prevention practice.
- Licensed & insured
- WorkSafeBC
- 25+ years
- Since 1999
- Serving BC
- All major regions
- 10,000+ properties
- Inspected
- Serving all of BCSince 1999
- Licensed & insuredWorkSafeBC
- Free phone consultNo pressure
- 25+ yearsFamily-operated
- 10,000+ propertiesInspected
Who we serve
GPR clients across BC
General contractors
Pre-excavation private-property utility locating. BC One Call covers public utilities — we cover what's on the lot, before your excavator hits something expensive.
Plumbers & mechanical trades
Slab leak location, underground service-line tracing, and pre-trenching scans. Find the leak before you cut concrete.
Concrete contractors & restoration
Pre-coring and pre-drilling scans of slabs, walls, and beams. Avoid rebar, post-tension cables, conduits, and embedded utilities.
Engineers & architects
Engineering-grade structural concrete assessments, post-tension mapping, slab thickness verification, and CAD-ready as-built capture.
Strata corporations & property managers
Parkade and podium utility mapping, common-property buried infrastructure, slab void surveys before owner-funded repairs.
Homeowners
Buried oil tank detection (pre-purchase or insurance), septic system location, slab leak location, lost-line tracing.
Environmental consultants
Phase II ESA support — buried tank, drum, and obstruction location for environmental due diligence.
Municipalities & government
Infrastructure mapping, road and pavement structural analysis, unmarked grave surveys, void detection in public spaces.
Why Leak.ca
GPR leak detection done right
Multi-frequency antennas
From 1.6 GHz (high-resolution surface scans of rebar at 5 cm) to 200 MHz (subsurface mapping past 5 metres). Right antenna for the job — not one frequency forced on every project.
Non-destructive — zero damage
GPR sees through concrete, soil, asphalt, and most surfaces without coring, cutting, or digging. The cleanest possible diagnostic.
Real-time + CAD-ready deliverables
We mark targets on the surface for your crew on the spot, then deliver CAD-importable maps for engineering and as-built records.
Combined with EM locator
GPR finds what EM can't (plastic pipes, voids, rebar, tanks) — EM finds what GPR can't (live energised lines). We run both, on every utility-locate job.
Cross-trained with acoustic + thermal
GPR is one of five technologies in our diagnostic toolkit. We deploy whichever fits the problem — or all three together for complex jobs.
WorkSafe BC compliant
Proper damage prevention practice for excavation. Our reports support your duty-of-care obligations and reduce hit-utility liability.
Engineering-grade documentation
Reports are accepted by structural engineers, civil engineers, environmental consultants, and BC's largest insurers. PDF + DWG/DXF deliverables.
25+ years across BC
Operating across British Columbia since 1999 — from single-residence slab scans to multi-hectare municipal utility maps.
Services
Specialist gpr services
Underground Water Leak Detection
GPR combined with acoustic correlation locates buried water service line and irrigation leaks before excavation — typically narrowing the dig to a 1-metre window.
Learn moreSlab Leak Location
Non-invasive location of plumbing leaks beneath concrete slabs. GPR finds the pipe, thermal finds the heat, acoustic confirms the source — combined accuracy within inches.
Learn morePre-Excavation Utility Locating
Private-property utility location — water, sewer, gas, electrical, telecom, lawn irrigation, lighting, drainage. Marked on the surface and delivered as a CAD map.
Learn morePre-Coring Concrete Scanning
High-frequency (1.6 GHz) scans of slabs, walls, and beams before coring or drilling. Maps rebar, post-tension cables, conduits, and embedded utilities.
Learn moreRebar & Post-Tension Cable Mapping
Detailed structural concrete scans for engineering and restoration projects. Full reinforcement and PT-cable layout in plan view.
Learn moreBuried Oil Tank (UST) Detection
Pre-purchase, insurance, and environmental due-diligence scans for buried fuel oil tanks. Critical for BC real-estate transactions on older properties.
Learn moreSeptic Tank & System Locating
Locate buried septic tanks, lids, distribution boxes, and drain-field lines on properties with lost or undocumented septic plans.
Learn moreUnderground Utility Mapping (CAD)
Property-wide subsurface utility mapping with CAD-importable (DWG/DXF) deliverables — for design, as-built records, and engineering coordination.
Learn moreVoid & Sinkhole Detection
Survey concrete slabs, parkades, podiums, sidewalks, and roadways for subsurface voids before they collapse into sinkholes.
Learn moreConcrete Slab Assessment
Non-destructive measurement of slab thickness, embedded reinforcement, voids, and moisture variation — for structural, restoration, and QC purposes.
Learn morePavement & Road Structure Analysis
GPR profiling of asphalt and concrete pavements — layer thickness, base condition, and subgrade integrity — for municipal and private road owners.
Learn moreEnvironmental Phase II ESA Support
Buried tank, drum, and obstruction location for Phase II environmental site assessments — supporting environmental consultants and lenders.
Learn moreForensic & Archaeological Surveys
Cemetery boundary verification, unmarked-grave location, and archaeological reconnaissance — for cemetery operators, municipalities, and First Nations land managers.
Learn moreBuried Obstruction Detection
Locate buried debris, concrete blocks, abandoned tanks, vaults, and forgotten infrastructure before site work or development.
Learn moreGPR Reports for Insurance & Engineering
Engineering-grade reports with annotated GPR profiles, plan-view maps, and findings narratives. Accepted by BC's structural engineers, insurers, and environmental consultants.
Learn moreWhen to call us
Signs you need a professional
Don't wait until minor issues become major losses.
BC One Call doesn't cover private property
Public utility locates stop at the property line. Anything inside the lot — drains, irrigation, electrical, gas, lawn lighting, septic — is your responsibility. GPR fills that gap.
Hitting a buried utility = $$$ + injury
Striking a live electrical conduit, a gas line, or a fibre run can mean injury, six-figure repairs, and project shutdown. A 30-minute GPR scan averts most of it.
Coring into rebar = structural compromise
Coring through structural rebar weakens the slab. A 1.6 GHz GPR scan maps every bar before the drill bit touches the surface.
Coring into a post-tension cable = catastrophic
Cutting a PT cable in a post-tensioned slab releases tens of thousands of pounds of force instantly. Engineer-required scans are mandatory before any penetration.
Slab leak excavation = $$$ if wrong
Digging up the wrong section of a slab costs more than the leak itself. GPR + acoustic narrows it to within inches before excavation.
Buried oil tanks = environmental liability
Undisclosed buried oil tanks (USTs) are a major BC real-estate liability — and a deal-killer for buyers. GPR surveys catch them before closing.
Septic system location for repair
Lost or undocumented septic tank/field locations turn a routine repair into an exploratory dig. GPR finds the tank, the lid, and the field lines.
Voids under slabs and parkades
Erosion, collapsed drainage, or settled fill can create voids beneath concrete — eventually causing sinkholes. GPR finds them before failure.
Concrete slab thickness verification
When the structural drawing says 200 mm and the contractor poured 150 mm, GPR is the non-destructive way to verify before final inspection.
Pre-construction utility mapping
Existing-conditions surveys before design or excavation reduce change orders, project delay, and contractor disputes.
Insurance & legal evidence
GPR-generated subsurface maps stand up as documentation in damage claims, encroachment disputes, and easement enforcement.
Forensic & unmarked-grave surveys
Cemetery boundary verification, unmarked grave detection, and forensic geophysics — handled with the same equipment and methodology.
How it works
What happens when you call
Simple, transparent, focused on getting you the answers you need.
- 01
You call us
Speak directly with a leak-detection expert. No pressure, no sales pitch — just guidance on what you need.
- 02
We assess your situation
We listen carefully to your concerns and determine if professional detection is necessary.
- 03
Schedule at your convenience
If detection is needed, we arrange a visit that works with your schedule. Fast response available.
- 04
Get clear answers
Our technicians arrive, conduct non-invasive testing, and provide precise results and next steps.
Real outcomes
Recent gpr wins
Slab leak located in a 200-unit tower without breaking concrete
Strata had ceiling damage on the 14th floor. GPR mapped the in-slab plumbing layout on the 15th floor, acoustic confirmed the source — repair scope reduced from 'cut up the whole bathroom' to a single 200 mm × 200 mm patch.
$80K utility hit averted before excavation began
GC was about to trench across a commercial property for new fibre. Our GPR survey found an undocumented active 600 V feeder running 1.2 m off the planned trench line. One re-routed trench saved a project shutdown, an injury risk, and $80K in repair.
Corroded rebar mapped before façade restoration on a 1928 building
Engineer needed to know where the original reinforcement was — and where it had corroded — before scoping restoration. 1.6 GHz GPR delivered a full reinforcement map with corrosion-indicator zones. Restoration scope tightened by 30%.
Undisclosed buried oil tank found at single-family home
Buyer commissioned a pre-closing oil tank scan after the home's age (1958) raised concerns. GPR located a 1,000-litre buried oil tank in the side yard. Sale renegotiated with seller-funded removal and remediation.
Unmarked graves located on historical cemetery boundary
Municipality needed to verify the historical cemetery boundary before adjacent land development. GPR survey identified multiple unmarked grave anomalies — boundary respected and development re-scoped.
Sub-slab void found before commercial parkade collapse
Building owner reported a 'soft' spot in the second-level parkade slab. GPR identified a 4 m × 2 m void beneath the slab where compacted fill had washed out. Targeted concrete repair completed before any structural failure.
Locations
Serving all of British Columbia
Click your city to see localized service details. Don't see your city? Call us — we cover all of BC.
- Will leak detection damage my property?
- No. We use non-invasive technology like thermal imaging, acoustic sensors, and ground-penetrating radar. No drilling, cutting, or demolition required in most cases.
- Does insurance cover leak detection?
- Many policies cover detection costs when water damage is present. We provide detailed reports for your insurance claim documentation.
- How quickly can you respond?
- Same-day response is often available for urgent situations. Regular appointments are typically scheduled within 24–48 hours.
- What if you don't find a leak?
- You receive a comprehensive report confirming no active leaks were detected. This documentation is valuable for insurance, property sales, or peace of mind.
- What is Ground Penetrating Radar (GPR) and how does it work?
- GPR uses pulses of electromagnetic energy (radar) transmitted into the ground or a structure. When those pulses reflect off subsurface objects with different material properties — rebar, pipes, voids, soil layers, tanks — the reflections are recorded and processed into an image of what's below the surface. It's completely non-destructive and emits no harmful radiation (the energy level is comparable to a Wi-Fi router).
GPR leak suspected? Talk to a tech.
Free phone consult with a 25-year expert. We tell you if a site visit makes sense — never push for one.