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In this whole-house renovation, Matt Hoots with @SawHorseDesignBuild demonstrates how to achieve high-performance air sealing in an existing brick home using AeroBarrier. With exterior access limited, the team preps the interior, sealing visible gaps and running a blower door system to pressurize the house while the atomized sealant finds and closes hidden leaks. The project reduces air changes from ~4 ACH to 0.96 ACH, exceeding local and national energy codes and approaching Passive House performance, all without a full gut renovation. This video highlights practical steps, considerations for surfaces and fixtures, and the potential of retrofit air sealing in improving energy efficiency, comfort, and overall building performance.