Building Enclosure Design and Practice: Where the Wall Meets the Roof

Presentation at A’18 MN The Minnesota Conference on Architecture, sponsored by BEC-MN.

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Wall/roof interface details often present the greatest challenges to building enclosure continuity. Architects, general contractors, subcontractors, and enclosure consultants must negotiate the complex network of differing objectives, opinions, and materials that converge at the wall/roof interface. This negotiation is essential to the success and performance of every construction project. This program will be presented in two parts: the first devoted to the design and theory of wall/roof interface details, including methods for adaptation of recent energy code and building science developments; the second part will focus on the practice of implementing successful details, including case studies of successes and failures and the lessons learned from each.


Lori Gunderson is building development manager at Hallmark Building Supplies, Inc. She has been a Tyvek Specialist for over 12 years. She works closely with architects, general contractors, builders, and installers to help build a quality, energy-efficient building.

Greg Johnson is a glass and glazing project manager at W. L. Hall Company with over 30 years of experience. He is responsible for large, complex glazing projects. He is a craftsman in his spare time and is extremely focused on the detailing and sequencing of projects.

Chelsea Karrels Ames, AIA, senior associate at WJE, Inc. Minneapolis, specializes in the evaluation and repair of building enclosure systems from design detailing through construction observation. Chelsea also provides building enclosure commissioning services, and has earned the Building Enclosure Commissioning Process Provider (BECxP) and Commissioning Authority + Building Enclosure (CxA + BE) accreditations from UW Madison.

James R. Larson, R.A., has been a registered architect for over 45 years. For the past 27 years, he has practiced as a consultant to architects, builders, and owners doing detail development, forensics, and job site troubleshooting. He enjoys the challenge of reconciling award-winning design expressions with the ever-increasing performance requirements for construction in the 21st century.

Mohammed Lawal, AIA, is principal and CEO at Lawal Scott Erickson Architects (LSE). The firm considers architecture a building block for how we shape the culture we live within. Throughout his career, Lawal has engaged in activities to help promote racial equity in a profession that’s short on diversity. In the mid-1990’s Lawal launched the locally based Architectural Youth Program, established to introduce minorities, women and at-risk youths, to architecture and the design arts.

Michael L. Spence, AIA, FCSI, is vice president of Building Science at Kraus-Anderson Construction Company, Inc. With over 40 years of design and construction experience, Mike provides quality and building-science expertise and services as a technical resource for KA clients, subcontractors, and internal staff in areas of project delivery, constructability, building technology, work flow/sequencing, and installation techniques.

Paul Whitenack, AIA, is manager of Building Science at Kraus-Anderson Construction Company, Inc. After starting his career in traditional architectural design firms in Milwaukee and Minneapolis, Paul has increasingly specialized in building science and enclosure technology, with an emphasis on field investigation, forensics, and quality assurance.

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