Green Roof Failures – What is to Blame?

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Webinar On-Demand
Sponsored by Tremco Commercial Sealants & Waterproofing
Presented by Rick Buist and Maha Nagra
If you attended the live webinar for a minimum of 45 minutes, you DO NOT need to complete the quiz to earn credit. Your certificate of completion will be added to your CE Center Credit Tracker within 24 hours and your credit will be reported to AIA.

Learning Objectives:

  1. Describe design parameters for vegetated roof assemblies.
  2. Identify typical components and how they work within the larger system.
  3. Recognize key performance criteria and how to design VR systems accordingly.
  4. Avoid common pitfalls in green roof design.


AAA 1 Structured Learning Hour
AANB 1 Hour of Core Learning
AAPEI 1 Structured Learning Hour
SAA 1 Hour of Core Learning
MAA 1 Structured Learning Hour
NSAA 1 Hour of Core Learning
OAA 1 Learning Hour
NLAA 1 Hour of Core Learning
NWTAA 1 Structured Learning Hour
This course can be self-reported to the AIBC, as per their CE Guidelines.

This course will walk through the typical causes of green roof failures and offer remedies to improve the quality of vegetated roofing system designs by focusing on detailing and system performance.

Photo of a guy pulling up the roots

Photo courtesy of Bioroof Systems Inc.

Rick Buist Rick Buist is a principal and president of Bioroof Systems Inc. He is an award-winning designer and horticulturist. For more than 10 years, Rick has been involved in the design and/or installation of more than 200 green roof projects throughout North America.
Maha Nagra Maha Nagra manages the Vegetated Roofs (VR) Program at Tremco Commercial Sealants and Waterproofing. In addition to providing system information to architects, consultants, and contractors, the VR Program team serves as a technical resource, assisting with specification development, product selection, and job-site support.

TREMCO Commercial Sealants logo. Tremco Commercial Sealants & Waterproofing (CS&W) is North America's foremost supplier of sealant, weatherproofing, and passive fire control solutions for commercial and residential construction and industrial applications.