5/16/2023 0 Comments Tight building envelopeThis process involves sealing the top plates of interior walls and all ceiling penetrations at the attic level, as well as the top and bottom plates and around rough openings of exterior walls. When applying housewrap, make sure to tape all vertical and horizontal seams and penetrations, seal top and bottom edges of the housewrap to the structure, and install the wrap using appropriate “shingling” methods to maintain the water barrier characteristics.įor the interior air barrier, use an airtight drywall construction approach. Exterior air barriers control infiltration of exterior air into the wall cavity and through the attic, limit the ability of moist outdoor air to enter the wall cavity during the cooling season and prevent wind-washing of wall insulation.įor the exterior air barrier, consider using housewrap or an insulated sheathing system. Interior air barriers control leakage of a home’s interior air into the wall cavity and attic, limit the ability of moist indoor air to enter the wall cavity during the heating season and limit convection losses within walls. While both types of air barriers serve similar purposes, each complements and enhances the effectiveness of the other. Install both interior and exterior air barriers Features of the design could include inline framing at 24 inches on center location of first-floor headers to the rim area and incorporation of optimized framing techniques to limit framing member count. While increasing the dimension of the wall framing will require design changes, it adds little or no cost to traditional, 2x4 framing methods. The thicker the studs, the more energy-efficient the wall system, provided that the wall cavity is properly insulated. Increase the dimension of the wall framing, typically from 2x4 framing to 2圆 framing Panelize wall sections to minimize confusion in the fieldĢ. ![]()
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