Electronic Leak Detection (ELD) FAQ's

ELD (Electronic Leak Detection) is the industry term used to define products and services that test and monitor for leaks or moisture presence in waterproofing membranes and roof assemblies. Detec provides ELD systems for inverted and conventional roof assemblies and is the only service that can reliably scan vertical membrane surfaces. Below are some frequently asked questions regarding Electronic Leak Detection. If you have a question that hasn’t been answered here, please feel free to call us at 855-75DETEC (855-753-3832). We would be happy to guide you to the best solution for your project.

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Electronic Leak Detection Testing

  • Q: Is an IntegriScan a viable alternative to flood-testing?

    A: Yes! Detec’s patented scanning technology can safely and accurately pinpoint leaks without the threat of water damage – a concern which is frequently associated with flood testing. Breaches are found immediately, so repairs can be done on the spot, with little or no down time.  Flood testing will tell you if there is a leak but can not pinpoint where the breach is located.

  • Q: How does your IntegriScan differ from EFVM®* (Electric Field Vector Mapping)?

    A: Unlike EFVM’s sampling method, Detec’s IntegriScan™ service scans 100% of waterproofing membrane to pinpoint any leaks. EFVM must set up a perimeter wire for each area to be tested as well as any grounded penetration such as drains. The area must have a continuous layer of water reaching all of their perimeter wire.  The IntegriScan has very little set up time. A Detec Systems field technician will connect to building ground, wet the area down and push the scanner over 100% of the waterproofing membrane. When the IntegriScanner crosses over a breach, Detec’s advanced electronics will give an audio and visual alert, signalling that an electrical path to ground has been found.

    *EFVM is a registered trademark of International Leak Detection

  • Q: Can black EPDM be tested using Electronic Leak Detection?

    A: In October 2017, Detec Systems released the ONLY technology available for testing black EPDM.  Click here for our technical bulletin.

  • Q: How does Detec’s IntegriScan compare with Infrared Thermography?

    A: Both are effective tools and can work well together.  Infrared Thermography is typically used to confirm that there is hidden moisture accumulation below the surface of the roof. Infrared can not determine the origin of a breach. The IntegriScan will pinpoint any breach in the waterproofing membrane. Any breaches found can be repaired and re-tested the same day.

  • Q: Can the IntegriScan test verticals for breaches?

    A: Yes!  The IntegriScan method can reliably test vertical surfaces.

  • Q: What setup is required before an IntegriScan can be performed? How long is the setup process?

    A: The IntegriScanner requires very little setup time (approximately 5 minutes).  The waterproofing membrane must be broom clean.  A hose and water source must also be available.  There is no need to set up a perimeter wire like vector mapping and no need to isolate grounded penetrations.  Typically, a field technician will arrive on site and inspect the areas to be tested.  The technician will then connect to building ground, wet the area down and begin scanning.

  • Q: How many square feet can the IntegriScanner test in one day?

    A: Typically, a field technician using the IntegriScanner can test up to 40,000sqft in one day.

  • Q: Can you test through overburden?

    A: Testing through heavy overburden is nearly impossible using any electronic leak detection method (ASTM D7877).  We recommend a one time leak detection test (IntegriScan) prior to the installation of any overburden and a fully monitored leak detection system (PermaScan).  Please contact us if you would like more information regarding testing through overburden.

  • Q: I have an existing leak in my roof. Is it possible to find the breach?

    A: It may be possible to find your breach.  There are a few variables.  Please contact us for more details on forensic scans.

  • Q: Is the IntegriScanner available for purchase?

    A: Yes!  The IntegriScanner (aka RMIS) is available for purchase.  Any purchase requires training.

  • Q: I’m considering a green roof for my building. How can Detec help?

    A: Detec’s patented PermaScan systems can be installed under Green Roofs to permanently monitor the performance of the waterproofing membrane. These permanent systems will pinpoint leaks early so corrective action can be taken immediately, preventing costly water damage from hidden moisture.

TruGround Conductive Primer

  • Q: What is TruGround Conductive Primer?

    A: TruGround Conductive Primer is a patented water based epoxy developed specifically for electronic testing of conventional roofing assemblies.  Once applied directly under the membrane to a non-conductive substrate, such as insulation or coverboard, the primer enables Electronic Leak Detection testing of the membrane for the life of the roof.

  • Q: Where does the TruGround Conductive Primer get applied?

    A: Detec’s patented TruGround Conductive Primer provides the conductivity required for an Electronic Leak Detection test to be valid.  TruGround is applied on the non-conductive substrate directly below the membrane.  Other materials, such as chicken wire mesh, placed under the coverboard or under the insulation produces invalid testing results.  Water would have to penetrate a breach and soak through any electrically insulating materials which is unrealistic.  The physics of ELD require a conductive medium directly below the membrane to complete the electrical circuit (ASTM D7877, section 5.5).  Click here for a technical note on testing conventional roofs using Electronic Leak Detection.

  • Q: How much area can TruGround cover?

    A: Detec’s TruGround Conductive Primer is sold in 5 gallon pails.  One 5 gallon pail of TruGround covers approximately 1,250-1,750sqft.  Coverage depends on the substrate the primer is being applied to as well as how it is applied.

  • Q: Who applies the TruGround primer?

    A: TruGround is typically applied by the roofer.

  • Q: How many coats are required when applying TruGround?

    A: TruGround conductive primer only requires one coat on most substrates.  Any coloration of the substrate visible through the primer indicates more primer is required.  Porous substrates such as plywood require two coats of primer to ensure proper coverage.

  • Q: How fast does the TruGround primer dry?

    A: Typically, TruGround dries in approximately 30 minutes.  Drying time depends on the temperature and relative humidity (RH).

  • Q: I’ve seen a wire mesh used as a conductive medium installed under the coverboard or under insulation. How does that work?

    A: Most membrane manufacturers do not approve the mesh to be installed directly under the the membrane resulting in incorrect placement under the coverboard or insulation.  As described in ASTM Standard D7877, Electronic Leak Detection requires a conductive substrate directly below the membrane for a valid test.  Click here for a technical note regarding improper placement of the conductive medium for ELD.

Leak Detection Systems

  • Q: I’m considering a green roof for my building. How can Detec help?

    A: Detec’s patented PermaScan systems can be installed under Green Roofs to permanently monitor the performance of the waterproofing membrane. These permanent systems will pinpoint leaks early so corrective action can be taken immediately, preventing costly water damage from hidden moisture.

  • Q: What is a PermaScan leak detection system?

    A: Detec offers several permanently embedded fully monitored leak detection systems.  A PermaScan system can be installed wherever hidden water intrusion is a concern.

  • Q: How does Detec’s PermaScan system differ from point-monitoring systems?

    A: Point monitoring systems utilize random sampling techniques. It is impossible to detect every moisture event with point sensors, because placement of these sensors is indiscriminate. Detec provides contiguous, linear coverage and constant monitoring therefore offering a complete solution for the problems related to unseen moisture intrusion.

  • Q: How does the PermaScan system report the information it collects?

    A: The moisture performance of the building enclosure and/or waterproofing assembly is emailed to predetermined facilities management monthly.  Clients can access their building reports in real time by logging on the monitoring center on-line. This information can then be reviewed by the facilities management staff so that corrective measures can be implemented, ensuring that small moisture problems do not become expensive repairs.

  • Q: How is the PermaScan system powered?

    A: PermaScan systems operate on low voltage. There are no batteries to replace, unlike wireless point-monitoring systems. This means that there is no radio frequency interference from our system, and no battery recycling issues.

General Questions

  • Q: I’ve seen a wire mesh used as a conductive medium installed under the coverboard or under insulation. How does that work?

    A: Most membrane manufacturers do not approve the mesh to be installed directly under the the membrane resulting in incorrect placement under the coverboard or insulation.  As described in ASTM Standard D7877, Electronic Leak Detection requires a conductive substrate directly below the membrane for a valid test.  Click here for a technical note regarding improper placement of the conductive medium for ELD.

  • Q: Can black EPDM be tested using Electronic Leak Detection?

    A: In October 2017, Detec Systems released the ONLY technology available for testing black EPDM.  Click here for our technical bulletin.

  • Detec acronyms

    EGLL (Electric Gradient Leak Locate)

    ELD (Electronic Leak Detection)

    MDT (Moisture Detection Tape)

    PermaScan-C (Conventional Assembly)

    PermaScan-I (Inverted Assembly)

    RMIS (Roof Membrane Integrity Scanner)

    RMU (Remote Monitoring Unit)

    VSLL/VSU (Vertical Surface Leak Locator/Vertical Scanning Unit)

     

     

     

  • More questions?

    Call us at 1-855-75DETEC (753-3832)

    or email us at info@detecsystems.com

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