Lunch and Learn: Cross-Laminated Timber


Councilmember Lewis is hosting a lunch and learn on Wednesday, October 7, 1:00-2:00p on mass timber and other sustainable construction practices.


You can watch the event here when it begins:

  • October 7, 1:00 PM - 2:00 PM


  1. Introductions (5 minutes)
  2. Tadashi Shiga on Passive House Energy Standards (10 minutes)
  3. Michael Eliason on Mass Timber and why it pairs well w/ Passivhaus, Reference Policies (15 minutes)
  4. Sloan Ritchie on the builder/developer experience of utilizing Mass Timber and Passivhau (10-15 minutes)
  5. Q&A (15-20 minutes)

Our Panelists

Tadashi Shiga

Tadashi Shiga has served as a trusted advisor to developers, third-party brokers, architects, contractors, and other industry experts for over three decades. He is the owner and operator of Evergreen Certified—a leading developer consultancy and certifying agency for sustainable construction practices—Evergreen Certified verified Seattle’s first passive single family, townhome, and apartment — and Ekovate, which specializes in cost-effective carbon-reducing technologies for developers and builders. Shiga also serves as Executive Director to Realogics Sotheby’s International Realty’s Land Division, where he leads a team of brokers aimed at expanding the firm’s new development portfolio and introducing boutique project lines that promote affordability and sustainability.

Evergreen Certified is consistently recognized for its accomplishments and was awarded the Master Builders Association Green Hammer in 2020 & 2013 for “Private Advocate” and the “Pioneer Award” in 2018. In 2019, Shiga was inducted into the University of Washington Bothell “Hall of Alumni Excellence” and was appointed to the institution’s Interdisciplinary Arts & Sciences Advisory Board.

Sloan Ritchie

Sloan Ritchie is a pioneer in the Passive House movement in Seattle. As a developer and general contractor, Sloan draws on building science principles and decades of experience to guide the design and construction of buildings that use up to 80% less energy for heating and cooling. With buildings accounting for nearly 40% of CO2 emissions in the US, Sloan sees the opportunity to address climate change through designing and delivering high-quality, comfortable and efficient buildings. His mission is to demonstrate the scalability and feasibility of using Passive House construction techniques to build cost-competitive high-performance projects, establishing Seattle as a leader in the nation and changing the way people think about where they live and work. Sloan is a graduate of Whitman College and an MBA graduate of the University of Washington. He speaks on the topic of residential green building and Passive House, as well as CLT construction. He is a sought-after expert for interviews on his approach, drive and project experience. His team and clients appreciate his approachable, calm nature and hands-on, insightful leadership style. Off work, Sloan enjoys windsurfing and traveling with his wife, Jennifer, and their two children.

Mike Eliason

Mike Eliason is a licensed architect with fifteen years of professional experience, who has devoted his career to innovation in green building, Passivhaus, community housing strategies, and innovation in Mass Timber. He has researched and worked on Passivhaus and Mass Timber projects in both the US and Germany, and given presentations on these topics internationally.

Mike is also a well-published writer, and an activist for dense, livable, affordable, and decarbonized communities. His recently completed projects in the U.S. include Western Yacht Harbor, the first building on the West Coast to utilize Dowel Laminated Timber, as well as the Goldendale Observatory State Park Addition and Remodel. He is presently working on a 50,000 sf Mass Timber school in King County, while also planning a Mass Timber Passivhaus Baugruppe in Seattle for his wife and kids.