Matt and Steve explore a 2015 modern home in coastal Maine, focusing on the transition between the insulated slab, foundation wall, and above-grade enclosure. The owners’ positive experience highlights that building performance includes more than energy efficiency; thermal comfort, indoor air quality, acoustics, and views all contribute to quality of life. Using 3-D drawings, Matt and Steve clarify complex foundation details and explain how free-draining gravel creates a capillary break against moisture moving upward from the ground. They also examine air sealing, vapor management, and a vertical insulation leg that reduces thermal bridging between the slab and stem wall. The episode reinforces the importance of coordinating foundation insulation and integrating aesthetics with performance from the start.