Matt and Steve examine a proposed two-story modern home in Climate Zone 2B to explore continuous exterior roof insulation. The details demonstrate how roof slope affects water shedding, attic headroom, and mechanical-system access. Matt and Steve compare rigid plastic foam and mineral wool insulation, explaining how differences in airtightness and vapor permeability influence moisture management and drying. They also show how Monopoly framing can simplify the transition between the exterior wall and roof by keeping control layers aligned. Finally, they introduce vapor profiling as a practical way to assess how an assembly’s materials work together to manage moisture and support drying.