Construction Systems Canada – Vancouver Chapter

Green Roof Design for Stormwater Management 
Green roofs have been consistently experiencing double-digit growth over the past decade. A major driving force has been stormwater management. This luncheon meeting will discuss how to design green roofs specifically for stormwater management and examine various municipal policies and programs and their pros and cons in promoting green roof installation for stormwater management.

The stormwater management potential of a vegetative roof depends on its water storage capacity as well as the rainfall pattern and climate zone where it is located. Water detention and retention characteristics of the individual components will be looked at and a review of how these components interact within a green roof system to manage stormwater runoff.

The sessions will also demonstrate how innovative water retention materials can maximize water storage while keeping the weight low. A concept of water-retention-to-weight ratio will be introduced to compare different green roof components to assist designers to make the proper choices.

A case study: The Broadway Tech Centre will be used to illustrate how these tools can be used in designing green roofs for stormwater management.

At the end of this presentation, participants will be able to:

  1. Understand the principal mechanisms behind how green roof manages stormwater
  2. Design a green roof to meet prescriptive- or objective-based stormwater policies
  3. Design green roofs for stormwater management using technical principles and data
  4. Specify green roof components/systems based on water-retention-to-weight ratio

Date: Thursday, January 14, 2016, 12:30-1:30pm
Location: Sandman Hotel, 180 West Georgia Street, Vancouver
Register: Online through Karelo at
AIBC Learning Units: 1 Core Unit
Cost: $39.90 for CSC members, $50.40 non-members

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