“By Others” – The Elusive Sub-contractor Responsible for Transitions
Event Type: 
October 09, 2020
12:00 pm to 1:30 pm
Virtual Meeting via Webinar
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This presentation will provide an in-depth look at the transitions between environmental separators for the roof, wall, and fenestration assemblies related to water control, air leakage control, thermal performance and vapor control.  Critical details that can contribute to building performance related issues will be the focus of this discussion.  Several variations of roof to wall connections and wall to window connections specific to curtain wall systems will be reviewed. A step by step evaluation of critical details in regards to sequence of construction, transition material options, and the various connections methodologies to produce airtight/watertight and thermally protected details will be presented.  Construction photos and job conditions will bring the realities of the construction process to illustrate typical issues found and how they can be potentially be addressed.


  1. Articulate how exterior enclosure transitions can impact building enclosure performance through example projects in regards to energy loss, building performance and the sustainability of the system.
  2. Correctly identify and prioritize critical details during the construction document phase to ensure an integrated approach is taken to water, air, heat, and vapor control.
  3. Assess each detail in regards to impacts of the 4 control layers and understand the various options for designing details for a variety of roof, wall, and window assemblies.
  4. Through the use of case studies and photos, plan out the proper sequence of construction and identify quality control methods in construction document review to provide corrective action.


Mr. Andrew Dunlap is a Principal at SmithGroup, Inc. and is the Building Technology Studio Leader. Mr. Dunlap’s primary work experience is focused on the analysis and development of building enclosure systems including wall cladding assemblies, air barrier systems, roofing, skylights, fenestration systems, and waterproofing.  Specializing in the Energy and Hygrothermal Evaluation and Analysis of wall, fenestration, and roof systems, Mr. Dunlap utilizes a number of advanced computerized analysis and simulation tools to perform his work.  His work extends from evaluating existing buildings, investigating problem buildings, revitalizing historic structures, to the design and consultation of new and specialty facades.

Mr. Dunlap received his B. Arch, B.S. in Mathematics, and M. Arch degrees from the University of Detroit Mercy.  He is active participant in the design and construction community, providing presentations and publications to several industry organizations including ASTM, BETEC, BEC, CSI, AIA2030, ABAA, and the USGBC. He has been involved in the local chapter of the Building Enclosure Council since its inception in 2008.  He is a member of the American Institute of Architects (AIA) and was the 2019 Detroit Chapter President.  He is a member of American Society for Testing and Materials (ASTM) and serves as the secretary for sub-committee on the Performance of Building Enclosures (E06.55).  He currently serves on the Air Barrier Association of America (ABAA) Board of Directors as the Vice Chair and is the Co-Chair of the ABAA Research Committee. He holds NCARB certification, CSI/CDT certification and is a LEED Accredited Professional. Mr. Dunlap is also on the University of Detroit Mercy’s advisory board for the Architectural Engineering program


For BEC Chicago members, an invite with REGISTRATION LINK will be sent out approximately 7 to 10 days in advance of event. After registration, a confirmation email with LOGIN INFORMATION with be sent for the virtual meeting that will be hosted through ZOOM. For non-BEC Chicago members interested in attending, you may contact Jeff Diqui at jdiqui@imiweb.org to request an invite. The inviation will include a REGISTRATION LINK.