This phase captures the heart of the on-site craftsmanship: turning factory-built hempcrete walls into a truly high-performance, energy-efficient home. After tilt-up day, the project moved into detailed envelope work and advanced building-science construction techniques.

The roof assembly features a double-roof design with continuous exterior insulation, high-performance underlayment, and an airtight Adhero weather barrier wrapping the clerestory and roofline. Every seam was air-sealed for durability and energy efficiency, followed by furring strips and decking to create a ventilated roofing system.

Inside, the vaulted ceilings were insulated with HempWool batts, maintaining the home’s commitment to renewable, vapor-open materials. Chrissy and Justin installed the tongue-and-groove pine ceiling, creating a warm, natural interior finish that complements the hempcrete walls.

Large triple-glazed windows from Lithuania bring in generous natural light, contributing both comfort and energy performance. Together, these envelope strategies — continuous insulation, airtight detailing, high-efficiency glazing, and natural insulation — form a cohesive system designed for durability, comfort, and exceptionally low energy use.