OSB Air Barrier
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Flatrock Passive: Wrapping Up the Air Barrier
After the OSB is installed on walls and ceilings, the joints are finished with acoustical sealant and flashing tape
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The Klingenberg Wall
To build a high-R wall, Katrin Klingenberg recommends using I-joists for studs, fiberboard for exterior sheathing, and interior OSB as an air barrier and vapor retarder