NDT (Non-Destructive Testing)

Common NDT methods in buildings include: rebound hammer (concrete surface hardness), ultrasonic pulse velocity (concrete quality), half-cell potential (reinforcement corrosion probability), ground-penetrating radar (reinforcement location, voids), infrared thermography (insulation defects, moisture, electrical faults), and acoustic emission (active crack monitoring). Each method has specific applications, limitations, and accuracy ranges. Results should be interpreted by qualified engineers.

NDT allows assessment of structural condition without destructive coring or opening up of construction. This is critical for occupied buildings, heritage structures, and pre-purchase assessments. NDT results inform decisions about structural adequacy, remaining useful life, and repair requirements.