Electronic Leak Prevention (ELP) is the most precise, non-destructive way to assess waterproofing integrity. It instantly detects even the smallest breaches — before they cause damage.
Most waterproofing membranes are installed over non-conductive surfaces like thermal insulation, cover boards, or even the supporting deck. Without a conductive substrate, Preventive Testing with ELD doesn’t work — making early-stage testing, post-trade inspections, and repeatable long-term verification impossible.
Controlit underlays are installed directly beneath the waterproofing layer(s) to create a stable, certified conductive layer.
This makes Electronic Leak Detection (ELD) possible — but more importantly, it enables Electronic Leak Prevention (ELP).
That’s not just detection after failure — it’s prevention by design.
Electrical resistance < 10 000 ohms (as per ASTM standards)
Under the waterproofing layer(s)
Сonductivity, for accurate and repeatable testing over time
Doesn't compromise the waterproofing system
Testing is done on non-conductive waterproofing systems, on exposed surfaces. Detects breaches by spark discharge — fast and precise.
Testing can be performed on both non-conductive and semi-conductive (EPDM) waterproofing systems, on both exposed and ballasted systems.
Place the underlay beneath any membrane—PVC, TPO, bitumen, EPDM—and connect a contact point.
Depending on the system and site conditions, use High Voltage (dry) or Low Voltage (wet) ELD testing.
The conductive layer is passive, permanent, and always ready for future testing.
Controlit’s system ensures flawless performance, regardless of who conducts the test. Whether you’re an waterproofing expert or a building manager, achieving certified-grade accuracy is simple.
For certified inspections with precision
Facility Managers & End Users – Routine checks without relying on external experts.
Verify your own work during or after installation.
“Controlit gives us control over our roof and flexibilty for testing. We can inspect anytime we need, very accurately, and adapt our test to the weather conditions.”
Construction Manager DC
Controlit Contact Point:
It provides the essential link that allows current to flow through the system — enabling accurate and repeatable testing.
With it, Leak Prevention becomes possible, reliable, repeatable and precise.
Controlit’s conductive underlay is certified for use with multiple waterproofing materials, ensuring reliability. Our technology meets rigorous ASTM standards, making it a versatile solution for any project.
By specifying Controlit from the start, you ensure the entire system is built for testing — with no limitations on method, equipment, or timing.
That’s not just smart design — it’s leak prevention by design.
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