25 Sep '11, 7am

Green Building Q&A: Spray foam and shear walls

So this months JLC has a letter from Thor Matteson concerning gluing shear wall panels to studs, quoted below. "A letter in the June 2011 issue ("Gluing Sheathing Improves Air Sealing") suggests attaching wall sheathing with adhesive. This could be a code violation in earthquake country. The "Special Design Provisions for Wind and Seismic" (SDPWS) governs wood-framed construction; SDPWS Section 4.3.6.3.1 states that "adhesive attachment of shear wall sheathing shall not be used alone, or in combination with mechanical fasteners." An exception to this provision allows using adhesives in Seismic Design Categories A, B, and C, but only with a severe penalty (the entire structural system must be designed to withstand about four times the earthquake force required for shear panels attached with nails alone). Almost all construction in California falls into Seismic Design Catego...

Full article: http://www.greenbuildingadvisor.com/community/forum/gener...

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