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SPECIAL TOPIC GREEN ROOF WEBINARS – Stormwater Management and Wind Design
AIBC Core Learning Units*
OAA Structured Learning Hours*
LACES, CSLA, OALA, BCSLA, AALA, APALA PDH Hours*
* With a certificate of completion
Engineering Vegetated Roof Systems to Optimize Stormwater Management
Urban centres have high concentrations of impervious areas which pose a challenge in managing large volumes of stormwater. Heavy rain events or back-to-back storms cause problems like flooding, property damage, and combined overflow sewer discharge. Green infrastructure, such as vegetated roofs, can help mitigate these problems because they restore the hydrologic cycle in urbanized areas. Vegetated roof systems designed for maximum stormwater management decrease the volume of stormwater within the urban core and reliably delay travel time of stormwater to the treatment plant. These retention and detention strategies help alleviate the burden of heavy stormwater on our cities’ infrastructure.
The distinction between stormwater retention and detention
The importance of detention in urban centres (ie Greater Toronto/Vancouver Area)
Existing roof top technologies
Using biomimicry to re-engineer vegetated roofing system
Vegetated or green roofs offer multiple benefits to urban areas. They manage stormwater, reduce energy demand, mitigate urban heat island, improve air quality and enhance biodiversity. The City of Toronto adopted the Green Roof Bylaw in 2010 and became the first city in North America to require green roofs on most new buildings, including high rise buildings and lakefront properties that experience high wind.
Wind flow around buildings creates both positive and negative pressure fluctuations across the roof, which affects both the roofing and the vegetated roofing systems. As part of the building envelope, it is important that that a vegetated roof is secured against these wind forces.
In this webinar, we will first take a look at CSA A123.24: Standard Test Method for the Wind Resistance of Modular Vegetated Roof Assembly and the 2 key test components to measure wind uplift and wind flow resistances. We will share case studies to demonstrate how vegetated roofing systems
behave at different wind pressures and wind speeds with videos of the tests. Finally, we will illustrate how to use CSA A123.24 in the wind design process of vegetated roofing assemblies.
Define modular vegetated roof assembly (MVRA)
Understand wind effects on roofing and vegetated systems
Recognize governing factors of wind resistance for MVRA
Test for wind uplift resistance and wind flow resistance
Next Level Stormwater Management is Canada’s leading supplier of pre-vegetated roofs such as LiteN’Less™, Xeroflor® and StormCap™systems. We customize to local requirements and offer warranty and maintenance support. Our team provides analytical support such as stormwater calculations specific to location and building/roof type. As a Purple-Roofpartner, Next Level Stormwater Management has access to the latest green roof stormwater test data and related innovative hydrologic modeling tool.
Emailor call (416) 637-5772 Ext 1 for stormwater calculations specific to your project.