Low Voltage Vector Mapping
Precision leak detection and repair verification for roofing and waterproofing membrane systems.
Low Voltage Vector Mapping
Following the High-Voltage sweep, Roof Analyzers performs Low-Voltage Vector Mapping (LV), also commonly referred to as EFVM (Electronic Field Vector Mapping) or ELD (Electronic Leak Detection), to identify more subtle membrane anomalies and confirm the integrity of completed repairs. This precision-based diagnostic method allows for detection of conditions that may not rise to the threshold of high-voltage identification but still present risk to long-term system performance.
Low-voltage testing provides refined analysis of the roofing assembly and serves as a critical verification step in the overall evaluation process, helping ensure repairs are effective and the roofing system is performing as intended.
How It Works
Low-voltage testing introduces a controlled electrical potential across the membrane surface. The system measures directional current flow to detect breaches or discontinuities in the roofing assembly.
Because LV testing operates at lower voltages, it is highly effective in evaluating seam integrity and subtle membrane conditions without compromising the system.
Ideal Applications
Low-Voltage Vector Mapping is well suited for:
Quality assurance testing
Seam integrity evaluation
Post-repair verification
Construction completion inspections
Waterproofing system validation
Ongoing system performance monitoring
What Low-Voltage Vector Mapping Detects
LV testing is particularly effective at identifying:
Debris trapped beneath membrane edges
Cold joints in membrane seams
Open or compromised T-seams
Minor discontinuities in the membrane
Subtle installation deficiencies
Areas requiring repair verification
These conditions, while sometimes less obvious, can become entry points for moisture intrusion if not addressed.
Precision & Verification
Low-Voltage Vector Mapping serves two essential functions:
1️⃣ Precision Detection
It identifies nuanced membrane conditions that may not be visible during visual inspections or fully isolated during high-voltage testing.
2️⃣ Repair Confirmation
After deficiencies identified in the High-Voltage sweep are corrected, LV testing is used to re-test repaired areas, providing confirmation that corrective measures were successful.
This layered testing approach ensures that repairs are not only completed—but validated.
Schedule Low Voltage Leak Detection
Maintain system performance through proactive diagnostic testing.