More building departments are beginning to require verified air-sealing. With a little information and planning, even builders new to blower-door tests can do much better than code.  More building departments are beginning to require verified air-sealing. With a little information and planning, even builders new to blower-door tests can do much better than code. Blower Door Testing, Diagnostic Tools, air barrier continuity, Air Sealing, air-sealing mudsillsRead MoreGreenBuildingAdvisor

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