Concrete Slab Thickness Measurement
Knowing the true thickness of a slab, deck or wall is essential for load assessments, change-of-use, overlay design and capital planning — but coring to find out is destructive and slow. GPR measures concrete thickness from a single accessible face, non-destructively, at as many points as your engineer needs.
Thickness data without destructive coring
Traditional thickness verification means drilling cores — damaging the slab, creating patch repairs and sampling only a few spots. GPR reads the back-wall reflection to estimate thickness across a grid of points from one side, leaving the slab intact.
Where slab thickness data is needed
Accurate thickness underpins many engineering decisions:
Load & capacity assessments
Change-of-use or new equipment requires confirmed slab thickness.
Overlay & topping design
Flooring, topping and waterproofing systems depend on the substrate.
Capital & due-diligence
Documented thickness supports condition and capital planning.
Single-sided, gridded readings
We take readings across a grid and calibrate against any available known point (or a single verification core) to improve accuracy, reporting thickness with the confidence range.
Detection methods we use
GPR back-wall reading
Estimates thickness from the slab's far-face reflection, single-sided.
Gridded survey
Multiple points mapped so variation across the slab is captured.
Calibration
Tuned to a known point for the best achievable accuracy.
Where this applies
- Slab load and capacity assessments
- Suspended decks and podium slabs
- Industrial floors for heavy equipment
- Walls and elevated slabs in commercial buildings
What you receive
- Thickness readings across the surveyed grid
- Map or table of thickness variation
- Confidence range for the readings
- Report suitable for structural engineers
Slab Thickness Measurement across Metro Vancouver & BC
We serve structural engineers and clients throughout British Columbia — Metro Vancouver, the Fraser Valley, Vancouver Island and the Interior.
Frequently asked questions
How accurate is GPR slab thickness?
With calibration to a known point, GPR typically estimates concrete thickness within a few percent. We report the confidence range with every survey.
Do you need access to both sides of the slab?
No. GPR measures thickness from a single accessible face using the back-wall reflection — no need to reach the underside.
Can you avoid coring entirely?
In most cases, yes. A single verification core can improve calibration, but the survey itself is non-destructive.
Can you map thickness variation across a floor?
Yes. We take gridded readings so your engineer sees how thickness varies across the slab, not just at one point.
Verify slab thickness without coring — book a non-destructive survey.
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.