Making the Connection: Fastening Through Continuous Insulation

This presentation initially took place at IIBEC's 2022 International Convention and Trade Show in Orlando, Florida.

Despite its many benefits, continuous insulation in exterior wall systems separates the cladding from the supporting structural framing (often by 2 in. or more), which can create severe demands on fasteners bridging the gap. Connection details become increasingly challenging to reasonably resolve demands and capacities, particularly with heavier claddings and thicker continuous insulation. The industry has responded to some degree: designers are being more creative, suppliers are developing proprietary thermally improved framing or clip systems, and model building codes recently incorporated fastening requirements. However, the industry has not fully addressed the complex array of conditions that can be encountered and the associated engineering issues to efficiently provide proper performance of the exterior wall system. This presentation discusses the complex behaviors of the seemingly simple cladding connections through continuous insulation, associated design challenges, concepts for resolving demands and capacities, and current requirements recently adopted in the International Building Code.

Leah Ruther, PE
Wiss, Janney, Elstner Associates Inc. | Grand Haven, MI

Leah Ruther is a licensed professional engineer at Wiss, Janney, Elstner Associates Inc. (WJE). She has a bachelor’s degree in civil engineering from Calvin University and a master’s degree in civil engineering from Lawrence Technological University. Since joining WJE in 2012, Ruther has been involved with numerous structural engineering and architecture-related projects. Her responsibilities include the investigation and analysis of existing and damaged structures, development of technical repair and rehabilitation documents, and construction observations. Ruther has experience with building enclosure–related failures such as water infiltration, air leakage, and condensation, as well as structural failures.

Logan Cook, PE
Wiss, Janney, Elstner Associates Inc. | Indianapolis, IN

Logan Cook is a licensed professional engineer at Wiss, Janney, Elstner Associates Inc. (WJE). He has a bachelor’s degree in construction engineering and management and master’s degree in engineering from Purdue University. Since joining WJE in 2012, Cook has served as project manager or project associate on hundreds of assignments related to the investigation, repair, and restoration of new and existing arenas, stadiums, museums, buildings, parking garages, and bridges. His experience includes evaluating challenges and developing solutions related to facades, roofing, waterproofing, masonry, concrete, steel and various types of structural systems.