Concrete Scanning You Can Trust – Christchurch & Canterbury

Know what’s beneath the surface before you cut or drill – stay safe, compliant, and on schedule with our expert concrete scanning.

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Need to locate services or rebar before you cut into concrete?

At Knockout, we use advanced concrete scanning technology to detect what’s hidden beneath the surface – helping builders, tradies, and project managers work safely, avoid costly mistakes, and keep projects on track. From small renovations to major commercial builds, we scan concrete slabs, walls, and structures across Christchurch and Canterbury. Our trained operators know what to look for, and we’ll clearly mark out the results for you, so you can cut or drill with confidence.

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Christchurch-based & locally owned

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A reliable, specialist team you can trust

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Accurate scanning for rebar, cables, pipes & post-tension cables

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Non-destructive testing that keeps your project safe and compliant

What We Scan

We help prevent costly delays, hazards, and damage by scanning for:


Rebar & Steel Reinforcement

Accurately locate reinforcing bars before you drill or cut, protecting structural integrity.


✅ Post-Tension Cables

Find high-tension cables in slabs to avoid accidental cuts that can cause structural failure.


✅ Electrical Conduits & Data Cables

Avoid electrical hazards, system outages, and expensive repairs by locating cables in concrete.


✅ Pipes, Voids & Utilities

Spot hidden pipes and voids to prevent leaks, water damage, and safety issues during work.

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Tools & Techniques We Use

We use high-frequency, non-invasive scanning technology to detect what’s hidden in your concrete – giving you a clear picture before you cut or drill.


  • Ground Penetrating Radar (GPR) – accurate, non-destructive scanning
  • Mark-ups & reporting – so you know exactly what’s where
  • Experienced operators – trained to interpret results
  • Fast response times – ideal for time-sensitive projects



Need a custom scan or site visit? Just ask – we’ll work to your needs.

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What You Can Expect

  • Accurate scanning and clear mark-ups onsite
  • Expert advice on safe cutting and drilling locations
  • Minimal disruption to your schedule
  • Quick response times for urgent jobs


Concrete scanning is all about protecting your project, your team, and your budget. At Knockout, we make it simple – you call, we scan, you cut with confidence.

TALK TO OUR TEAM
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What People Say About Us

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Ready to Get Started?

Let’s Talk. 03 349 66 84

Give us a call or request a free quote today – our team will get you sorted fast.