Structural audits are no longer limited to aging infrastructure. They are vital for ensuring the quality, safety, and compliance of both new and existing concrete structures. While conventional NDT methods reveal surface and material properties, they fall short in identifying internal reinforcement details. This article highlights how advanced rebar scanners like ReX 100, powered by real-time sensing and AI, enable fast, non-invasive, and highly accurate insights into rebar location, cover, and sizing, empowering engineers to make smarter, safer, and more efficient decisions.