As architects and planners seek to maximize the use of all available space, the next generation of low-slope roofs are not only waterproof coverings, but platforms for assets such as solar panels, green roofs, water storage, and amenity spaces. With so much value tied up in our roofs, their resilience is more important than ever. This resilience is measured not in the immediate ability of the roof to withstand the elements, but in its performance over years and decades. As owners and property managers come and go, long-term roof maintenance can become a forgotten issue and defects that have been present since construction can lead to water intrusion that degrades the roof and greatly reduces its lifespan. In response, automated leak detection systems have emerged as a technology adding value for both quality assurance during the construction process, and as an early warning system alerting building owners to developing issues within their roof. Used properly, these systems extend the lifespan of the roof which in turn minimizes disruption to the assets on or below the roof, as well as increasing the quality of life of occupants using the building.

Automated leak detection systems continuously monitor the roof membrane environment, transmitting data which is used to provide a report on the health of the waterproof membrane. Stakeholders gain access to critical information as the roof system is completed - identifying damage caused during construction and verifying repairs prior to commissioning the building. During the operational life of the structure, automated leak detection systems employ sophisticated algorithms, enabling predictive leak detection, location, and assistance with preventive maintenance strategies - significantly reducing the cost of repairs.

This presentation explores the utilization of automated leak detection systems in low slope roofing, with a particular focus on Vancouver, BC lower mainland area. Drawing on experience installing and operating leak detections systems across North America, we highlight several areas in which construction practices inevitably leave defects in the waterproof membrane. Our case studies range from the very common occurrences of construction material being accidentally embedded in the layers of the roof, to chemical burns from adhesives, and risks unique to green-roof infrastructure. In explaining how these defects allow moisture to ingress into the roof environment, we will elaborate on what kind of issues can occur, with reference to real-world instances where substantial maintenance was required just months into the operational life of the roof. Finally, we demonstrate how automated roof leak detection can be used to mitigate the risk of membrane defects going unnoticed by actively monitoring the roof and guiding repairs when necessary. Case studies of both conventional and inverted roof assemblies will demonstrate how automated leak detection systems have protected the inherent value of the roof, and added value of their own over the life of the structure.