Electronic Leak Detection

Detec New Zealand's presentation is an introductory guide to Electronic Leak Detection (ELD) — a testing method for finding breaches in waterproof membranes, explained via ASTM standards, why it beats traditional flood testing, and the different testing techniques and site requirements involved

It backs this up with real failure examples and a detailed case study (Oak Shores Apartments, Queenstown, a $160M+ remediation failure) showing why proper ELD testing matters, closing with a summary of ELD's benefits and contact details for Detec.

Three key learning outcomes from the presentation:

• Why ELD matters: Electronic Leak Detection is a more reliable, cost-effective, and sustainable way to verify waterproof membrane integrity than traditional flood testing, and should follow ASTM D7877 standards since New Zealand has no local standard of its own.
• How it works: There are several ELD methods (high-voltage/spark testing, vector mapping, low-voltage scanning and roller scanning), each with specific site requirements — proper grounding, an exposed membrane, a clean site, and a conductive substrate pathway — needed for a valid test.
• Why it's high-stakes: The Oak Shores Apartments (Queenstown) case study shows how inadequate or non-compliant testing can lead to catastrophic failures and massive remediation costs, underscoring the value of correctly performed, standards-compliant ELD testing.