Sub-Slab Pressurised Pipe Leak Detection
Under a large commercial or industrial concrete floor, a pressurised pipe leak can undermine the slab, waste water and disrupt operations — and cutting blind to find it is enormously costly. We locate sub-slab leaks from the surface and mark the single spot to core, then scan that spot for rebar and conduit so the cut is safe.
Sub-slab leaks under large floors
Commercial and industrial slabs are thick, heavily reinforced and often carry production above them. A leak in the domestic-water, mechanical or process piping beneath shows as damp, efflorescence or unexplained water loss. The challenge is locating it without trenching the floor.
How we locate without trenching
We combine pressurised-leak and imaging methods:
Locate the exact cut point — one core, not a trench
The whole point of a sub-slab investigation is to convert an open-ended floor demolition into a single, confident core. We mark the spot, confirm depth, and GPR-scan it for embedded hazards before anyone cuts.
Process-line vs. domestic-water leaks
Industrial floors carry process and mechanical lines as well as domestic water. We identify which system is leaking so the right trade makes the repair and production planning is accurate.
Detection methods we use
Acoustic
Detects the sound of a pressurised leak transmitted through the slab.
Tracer gas
Pinpoints leaks on quiet plastic lines and confirms the acoustic position.
GPR pre-cut scan
Maps rebar, post-tension and conduit at the cut location so coring is safe.
Where this applies
- Industrial plants and manufacturing floors
- Warehouses and distribution centres
- Commercial buildings with slab-on-grade
- Institutional facilities with concealed sub-slab piping
What you receive
- Marked cut location with depth
- Identification of the leaking system
- GPR clearance of the cut point (rebar/PT/conduit)
- Report for facility and engineering teams
Sub-Slab Leak Detection across Metro Vancouver & BC
We serve facility managers and clients throughout British Columbia — Metro Vancouver, the Fraser Valley, Vancouver Island and the Interior.
Frequently asked questions
How is this different from a residential slab leak?
Commercial and industrial slabs are thicker, heavily reinforced and carry operations above. The methods are similar but the safety scanning, system identification and operational planning are more involved.
Can you find process-line leaks under an industrial floor?
Yes. We identify whether the leak is on domestic water, a mechanical loop or a process line, and locate it accordingly.
Do you scan for rebar before we cut?
Always. We GPR-scan the marked cut point for rebar, post-tension cable and conduit so the core is safe.
How accurate is the cut location?
We pinpoint to a small marked area and confirm depth, so a single core exposes the leak rather than an exploratory trench.
Can you work around production?
Yes. The survey is non-invasive and we schedule the work around your operations.
Find the exact spot to cut — book a sub-slab investigation.
LeakInspections.ca — a division of Anyleak.ca and the Leak.ca family. Professional, non-invasive leak detection across British Columbia since 1999. Call 604-239-9934.