Matt and Steve examine a 2015 timber-frame Passive House in coastal Climate Zone 5A. The home combines a double-stud wall with a structural insulated panel (SIP) roof, allowing the timber frame to remain exposed indoors while delivering high thermal performance. They discuss roof-overhang connections, water management, and how sheltering geometry can complement control-layer detailing. Matt and Steve emphasize airtightness at SIP panel joints and the use of membranes to connect roof and wall air-control layers. Because these assemblies are complex, installation sequencing, construction documents, trade scopes, and material scheduling are critical. The episode also explores vapor profiles and demonstrates how three-dimensional details reveal continuity between the R-40 walls and R-60 roof.