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Building America Expert Meeting Report: Cladding Attachment Over Exterior Insulation

Building Science Corporation (BSC) held an expert meeting on Cladding Attachment Over Exterior Insulation on Saturday, July 28, 2012 at the Westford Regency Hotel in Westford, Massachusetts. Featured speakers included Jay Crandell of ARES Consulting, Peter Baker of BSC, Gary Parsons of DOW Chemical Company, Vladimir Kochkin of the National Association of Home Builders Research Center, Randy Van Straaten of BSC, and Dawn Cole of James Hardie Building Products (presented on her behalf by Jay Crandell). This was followed by an open question-and-answer discussion period.

The Building America expert meeting focused directly on supporting the Building America Standing Technical Committee identified Critical Milestone #1:
By end of 2015, have adopted code language defining the requirements for attaching cladding over typical thicknesses of insulating sheathing (i.e., 1”, 1.5”, 2” and 4”) for both 16” and 24” o.c. framing.

The meeting focused on issues surrounding cladding attachment and performance of walls with exterior insulating sheathing. The topics of discussion were split into two1 separate categories:
1. Gravity load resistance
2. Wind load resistance.
The presentations explored these topics from the perspectives of engineering design, laboratory testing, field monitoring, and practical construction.

The attached report describes the topics, presentations, and results from the meeting.