GPR Services · Fraser Valley
Slab Leak Detection in Chilliwack, BC
GPR maps the in-slab plumbing and rebar so thermal and acoustic findings convert into a single small repair patch — not a jackhammered floor. Serving Chilliwack and the Fraser Valley region with certified technicians, non-invasive methods, and insurance-ready documentation — since 1999.
Free phone consult · No pressure · Mon–Sat 8am–6pm PT
Chilliwack ground conditions & what they mean for GPR
Local geology: Chilliwack sits on Fraser floodplain gravels and sands with mountain-fan gravels at the valley edges. Free-draining floodplain gravels are superb GPR ground — 3–4 m penetration is routine, among the best in the Lower Mainland.
Local building stock: Dairy and berry operations, fast-growing Sardis subdivisions, and military lands with legacy buried infrastructure.
Common slab leak detection work in Chilliwack
- Deep utility mapping in floodplain gravels
- Dairy operation waterline tracing
- Subdivision pre-dig locates in Sardis
- In-slab copper and PEX lines
- Radiant heating loops
- Post-tensioned residential slabs
How the Chilliwack site visit works
- 1
Thermal pass
Infrared imaging maps the moisture or heat plume through the slab surface — the first non-invasive evidence of where the leak is.
- 2
GPR slab map
1.6 GHz GPR images every pipe, rebar bar, and PT cable in the suspect zone so we know exactly what is beneath the thermal anomaly.
- 3
Acoustic confirm
A ground microphone over the mapped pipe confirms the pressurised leak sound at the suspected point.
- 4
Patch window mark
Repair window marked between rebar/PT cables — your plumber cuts one tile-sized patch, clear of structure.
Chilliwack questions, answered
Why does the GPR step matter if thermal already found the warm spot?
The warm spot tells you roughly where the water is — not where the pipe is, or what else is embedded in the slab. Cutting on thermal alone risks hitting rebar or a post-tension cable. GPR maps the slab internals so the patch lands on the pipe and nothing else.
Can you scan post-tensioned slabs?
Yes — PT cable mapping is one of GPR's core jobs. Cutting a tensioned cable is catastrophic, so on any post-1970s suspended slab we map cables first and mark the repair window between them.
Does slab thickness affect detection?
Standard 100–200 mm residential and commercial slabs are well within 1.6 GHz range. Thickened footings and toppings up to ~45 cm still image clearly; beyond that we adjust antenna frequency.
Will my floor finish be damaged?
No. GPR, thermal, and acoustic are all surface-contact, non-destructive methods. The only opening ever made is the final repair patch — by your contractor, exactly where we mark.
How deep can GPR scan in Chilliwack?
Chilliwack sits on Fraser floodplain gravels and sands with mountain-fan gravels at the valley edges. Free-draining floodplain gravels are superb GPR ground — 3–4 m penetration is routine, among the best in the Lower Mainland. We select antenna frequency to match — and where local ground limits radar depth, we pair GPR with electromagnetic locating, acoustic methods, or tracer gas so the survey objective is met regardless of soil conditions.
Do you actually work in Chilliwack, or dispatch from elsewhere?
Chilliwack is part of our standing Fraser Valley service area — the same certified technicians and equipment that cover the rest of the region. Scheduling is typically within 24–72 hours, with same-day response often possible during business hours (Mon–Sat, 8am–6pm Pacific).
What does slab leak detection cost in Chilliwack?
Pricing matches our province-wide structure — no regional premium for Chilliwack. Most residential-scale work falls in the $350–$1,200 range depending on scope; commercial and multi-site projects are quoted after a free phone consult. Call 604-239-9934 and we will give you a tight estimate in five minutes.
Other GPR services in Chilliwack
Underground Water Leak Detection in Chilliwack
GPR + acoustic correlation locates buried water service line and main leaks before any excavation — typically narrowing the dig to a 1-metre window.
View servicePost-Tension Cable Mapping in Chilliwack
Cutting a live PT cable releases tonnes of force instantly. GPR maps every cable before any coring, cutting, or anchoring on a post-tensioned slab.
View serviceCore Drilling Safety Scanning in Chilliwack
Every core hole cleared before the bit touches concrete — rebar, PT cables, conduits, and in-slab pipes mapped at each penetration point.
View servicePipe Leak Detection in Chilliwack
Any pipe, any material — metal, PVC, PEX, asbestos-cement. GPR sees what EM locators can't, and pairs with acoustic and tracer gas for the confirmation.
View serviceSlab Leak Detection near Chilliwack
Need slab leak detection in Chilliwack?
Free phone consult with a certified GPR technician — we will tell you whether a survey is warranted and quote it in five minutes. No pressure.