Steve walks viewers through the importance of building airtight structures using clear, real-world examples from a current job site. He focuses on maintaining continuous air barriers, emphasizing that you’re either “inside” or “outside” the protective envelope of a structure. Using the “red line test,” Steve demonstrates how uninterrupted air barriers improve energy efficiency, comfort, and health. He explains the correct sequencing—building the airtight box first, then attaching exterior elements without compromising it. Steve blends hands-on construction details with relatable analogies, like comparing air barriers to zipping a winter jacket. His passion, humor, and deep expertise shine in this practical yet enthusiastic explanation.