2021 IECC Climate Zone 5C Cool Marine Building Assemblies Vented Attic, 2x4 Wall, Interior Insulated Basement Vented Cathedral Ceiling, 2x6 Wall, Interior Insulated Basement Vented Over Roof, Unvented Cathedral Ceiling, 2x6 Wall, Interior Insulated Basement Vented Cathedral Ceiling, 2x6 Wall, Slab on Grade Vented Attic, Exterior Double Wall, Interior Insulated Basement Vented Attic, ICF Wall, ICF Basement Foundation Vented Attic, Interior Double Wall, Interior Insulated Basement Vented Attic, Strapped 2x6, Interior Insulated Basement Unvented Roof, 2x6 Wall, Vented Crawl Space