Rooftops offer a means to manage rain and increase building energy efficiency, provide wildlife habitat and the biggest return on investment is the extended life of the roof membrane materials. As of July 9, 2018, Portland’s new Central City zoning code will require certain new buildings to install ecoroofs. The city has enacted one of the most comprehensive Ecoroof (Greenroof) mandates in the United States. This was no easy decision, yet after 20 years and the construction of almost 700 ecoroofs the city has the experience and confidence to pursue such a requirement. This presentation will explore the new code requirement, ecoroof design, construction and maintenance.
Health, Safety and Welfare
1) Communicate the new Portland city zoning code and its applications.
2) Lessons learned from the past 15 years of being involved in green roofs in Portland including basics of design; growing media, plants, drainage, irrigation, edging and pavers.
3) Collaboration needed between architects, landscape architects and construction contractors.
4) Discuss importance of helping clients understand long term operations and maintenance, especially concerning irrigation in the Portland climate.
Tom Liptan, FASLA, Green Infrastructure Consultant and former City of Portland Ecoroof Program Manager
ASLA Oregon Chapter