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Build Science™ 401
Build Science™ 401 | Episode 10: Passive House Roof Assembly
On Episode 10 of Build Science™ 401, Matt Risinger and Steve Baczek continue to explore how a home’s exterior envelope must integrate air, water, vapor, and thermal control layers for durability and energy efficiency. Using a 2010 coastal New England passive house as a case study, they examine roof assemblies, insulation placement, ventilation paths, and standing seam metal roofing, emphasizing continuity across transitions and critical details like windows, doors, and double-wall assemblies. They highlight water management strategies, including deep overhangs, vented roofs, and sacrificial insulation layers, and explain how windows uniquely handle all four control layers. Matt and Steve also discuss material choices, air sealing techniques, and raised-heel trusses to maximize thermal performance, showing how careful design, integrated materials, and construction sequencing result in airtight, resilient, and high-performance homes that meet passive house standards.
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Episodes
Build Science™ 401 | Episode 1: Basement Slab Foundation Wall Details
Episode 1
Episode 1 of Build Science™ 401 emphasizes the importance of aligning air, water, vapor, and thermal layers in the building envelope, focusing on a real-world ICF foundation with integrated insulation, rebar, and smart water management strategies.
Build Science™ 401 | Episode 2: Insulated Concrete Form (ICF) Foundation
Episode 2
Episode 2 of Build Science™ 401 covers how to build a high-performance foundation by aligning and maintaining continuous control layers for water, air, vapor, and thermal management. Focus on real-world performance over theory for resilience and efficiency.
Build Science™ 401 | Episode 3: Crawlspace Foundation
Episode 3
Episode 3 of Build Science™ 401 details a crawlspace or “short basement” foundation using real 2D and 3D drawings to show how water, air, vapor, and thermal control layers must align and remain continuous. Matt & Steve explain how elements like sub-slab insulation, drainage, closed-cell spray foam, and exposed foundation work together to manage moisture, air leakage, energy performance, durability, and region-specific risks like termites and frost depth.
Build Science™ 401 | Episode 4: Slab on Grade Foundation
Episode 4
Episode 4 of Build Science™ 401 walks through the building envelope as a fully integrated system, emphasizing (you guessed it) that continuity of water, air, vapor, and thermal control layers is what ultimately determines durability and performance. Matt and Steve reiterate one of their most common warnings: water is the number one enemy, followed closely by air, and that most “vapor problems” are really failures in water or air management.
Build Science™ 401 | Episode 5: Slab-on-Grade Retrofit
Episode 5
Episode 5 of Build Science™ 401 episode walks through a slab-on-grade retrofit detail to show how air, water, vapor, and thermal layers must work together as one continuous system for durability and comfort. Matt Risinger and Steve Baczek emphasize managing water and air first—using integrated WRBs, vented rainscreens, elastic sealants, and continuous insulation—so assemblies can drain, vent, and dry instead of trapping moisture.
Build Science™ 401 | Episode 6: Floor Framing & Foundation
Episode 6
On Episode 6 of Build Science™ 401, Matt Risinger and Steve Baczek wrap up their deep dive into floor assemblies and building envelope integration. They emphasize the importance of durability over insulation values in certain areas, explaining why moving insulation to the interior can protect exposed concrete and critical junctions.
Build Science™ 401 | Episode 7: Floor Assembly with Offsite Components
Episode 7
Build Science™ 401 Episode 7 explores how a highly integrated floor and foundation system comes together in an off-site–built home. Matt Risinger and Steve Baczek walk through the use of precast Superior Walls, engineered open-web floor trusses, ZIP-R sheathing, drain-and-vent cavities, and layered air-sealing strategies to manage moisture, airflow, and heat in a challenging, cold, high-moisture site.