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This two-story enclosure with a basement is designed for Beacon Hill, MA (Cold Climate). It features an unvented roof with 6” closed-cell spray foam insulation in rafter cavities, and slate roofing tiles. The 2x6 advanced wood frame walls are insulated with 4” closed-cell spray foam insulation in framing cavities. The rim joist is insulated with closed-cell spray foam insulation on the interior. The foundation wall is insulated with 2” closed-cell spray foam insulation in a 2x3 wood frame wall (1” off wall) on the interior. 2” XPS rigid insulation is installed under the foundation slab.
Enclosure Design
