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Avoid Your Worst Nightmare



What is a Leak Detection System?

A leak detection system is a network of sensors that are permanently installed in the roof assembly, which report moisture content and track membrane breaches.


For building owners and managers, a leak detection system assists with maintenance decisions and extends the useful life of the roof. 

These permanently installed systems enable the user to plan proactive maintenance, track concerning patterns of moisture build-up, and vastly reduce the cost and time of roof repair when a leak is located.

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Select Your Roofing Assembly to Learn More



The main difference between the Active and Passive systems is what is enclosed in the junction box(es). On a passive system, the junction box will be essentially empty except for terminated cabling, for use when an SMT Technician comes to take readings.

On an active system, the junction box will host automated measurement electronics with an internet gateway to send all data to the cloud. Typically junction boxes are installed on a deck by deck basis, or in a single centralized location. See Passive VS. Active junction box examples below.

A passive system is left dormant, it does not take any readings or store any data from the sensors.

This system requires an SMT technician to visit the site to temporarily activate the system as scheduled with the client, typically 1-4 times a year and/or for an active leak investigation.

An SMT technician activates the system by bringing portable electronics to site, accessing the junction box(es), and activating the sensors to start taking readings. Once this has been done, a technician then compiles the data of your roof’s membrane into an easily digestible report.

An active system is constantly collecting data and uploading it to the online monitoring center where data is stored and accessed from any web browser. 

In the event a deficiency in the membrane is found, the system can notify the client of the deficiency by sending an alert to their email. This allows proactive and targeted repairs before a leak develops into a large-scale problem.

NOTEAn Active system does NOT mean SMT is actively monitoring the data, just that the system is actively taking readings and logging data. SMT engagement would require a monitoring contract with SMT.



SMT have provided leak detection scanning services to various award winning projects and clients around the world. By having your roof membrane scanned during construction, you can know about breaches through our report, giving you the chance to make repairs before work on site is completed. 


With a scan, you can;

- Check the quality of your roof during construction

- Make proactive repairs before the application of overburden

- Verify the quality of small spaces, rough terrain, and hard to reach places with Digiscan's lightweight and portable design


Select Your Structure Type to Learn More

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Want to learn more about what type of leak detection is right for you?
Download one of our handy overview documents or 
Contact SMT to talk to our technical consultants.

SMT Leak Detection Flow Chart

RCABC RoofStar Leak Detection Guide

RGC GUARANTEE: Roofing Contractors of British Columbia (RCABC) accepts SMT Research’s system for use in the RGC Waterproofing Guarantee Program. SMT’s leak detection and location system is a mandatory requirement for compliance to RGC guarantee standards for waterproofing system that incorporate heavy or complicated overburdens in their design.

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