From The Build Show.
In Today’s episode of Best of Build show, we dive into one of the most misunderstood topics in residential construction: vapor control. Matt Risinger introduces the episode and sets the stage for a deep dive into how moisture really behaves inside wall assemblies. Jake Bruton takes us to the Hilltop Arrow Project to break down smart, climate-specific decisions around the four control layers—water, air, thermal, and vapor. You’ll learn why vapor control matters less than air and water, and how exterior insulation, airtight construction, and smart vapor retarders work together to reduce risk. With clear explanations and real-world examples, this episode helps builders avoid common mistakes that lead to moisture damage. If you want practical building science guidance you can confidently apply on real jobsites, this conversation delivers clarity, context, and proven strategies.
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