Matt and Steve explore a 2019 modern home in coastal Maine designed to combine a polished concrete first floor with a full basement. The project required careful coordination of insulation, structure, and moisture management. They examine how sealants and a self-adhered weather-resistant barrier connect the foundation, framing, and sheathing to maintain continuous air and water control. Matt and Steve also discuss rainscreen depth, ventilation, and drying potential. A key lesson is that control layers are easier to execute when they remain continuous and co-planar. They emphasize that air leakage can transport significantly more moisture than vapor diffusion, so airtightness is essential to durability. Remember: utilize tools like a blower door test to help identify and address significant leaks.