Jake Bruton breaks down the four control layers that shape high-performance building design: water, air, vapor, and thermal. He explains why moisture management comes first, outlining how proper detailing around roofs, windows, and water-resistant barriers protects long-term durability. From there, he addresses air leakage as a major driver of energy loss, indoor air quality issues, and hidden moisture problems. Bruton challenges common misconceptions about vapor diffusion, arguing that uncontrolled air movement, not vapor drive, is typically the real culprit in building failures

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