Verifying Membrane Integrity with Electronic Leak Testing: (ELD)

Waterproofing performance determines building durability. Membrane roofs are intended to block water ingress, but site activity after installation introduces risk. Without verified membrane integrity before occupancy, undetected breaches can lead to costly long-term damage. 

The Challenge 

During late-stage construction, trades access the roof for penetrations and material movement. These activities often disturb detailing or damage the membrane without leaving visible evidence. 

Visual inspections may show compliance, but they cannot verify actual waterproofing performance. Microscopic breaches often evade detection until water ingress occurs, causing internal damage that is difficult and costly to remediate. 

The ELD Solution 

Nuralite’s Electronic Leak Detection (ELD) ready membrane roof, provides a quantifiable method for verifying membrane integrity prior to project handover. 

A low-voltage current is applied to the membrane surface. Intact membranes stop current flow; breaches allow detection at the substrate. ELD identifies and marks defects for immediate repair. The process is non-destructive, covers the entire roof area, and detects faults missed by visual inspection.

Handover Benefits 

Waterproofing compliance is typically documented using a producer statement and visual assessment. This standard process confirms the installation aligns with manufacturer requirements. It does not account for damage inflicted during subsequent construction activity. 

ELD provides measurable performance data at handover. Defects are identified and repaired while access remains. Documented results establish that the roof is watertight and strengthen project close-out records for future reference. 

Designed for Specification 

ELD is specified as a commissioning requirement, aligning waterproofing verification with performance testing used for mechanical and electrical systems before handover. 

This testing is highly indicated for: 

• Large commercial buildings with extensive roof footprints 

• Roofs positioned over occupied, critical, or sensitive internal spaces 

• Complex architectural designs featuring multiple penetrations 

• Projects requiring verified performance metrics beyond standard warranties 

Nuralite includes ELD testing within its waterproofing scope, with results documented in the final project records. 

Outcome 

On a recent project, ELD testing identified several micro-defects that standard inspection missed. Repairs were completed before handover, and membrane integrity was documented in the final project records. 

Immediate repair and retesting confirmed membrane integrity. Documented results in the handover package show that integrating Nuralite Membrane Systems with ELD enables early detection, efficient remediation, and reliable waterproofing at completion. 

11th May 2026