Conductive Mesh Testing for Geomembranes

How Conductive Mesh Testing for Geomembranes Works

Conductive mesh testing involves placing a conductive grid array over a geomembrane liner and applying a low-voltage electrical current. The conductive grid creates a known electrical potential across the liner surface. Any breach in the geomembrane — from a puncture, seam failure, or material defect — creates a localised electrical potential change that is detected by the instrumentation. The technician uses a handheld probe to map the electrical field and identify the exact location of each breach. This method is commonly used for new liner quality assurance, detecting installation damage before the liner is covered with soil or water. It is also used for in-service liner leakage location on ponds, reservoirs, and green roof systems.

Applications in BC

• New geomembrane liner quality assurance testing
• Green roof waterproofing membrane integrity verification
• Pond and reservoir liner leak detection
• Landfill liner and cap system integrity testing
• Decorative pond and water feature liner testing