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Air Sealing Where it Counts

The graph below shows which structural air-leaks drive up energy costs the most, allowing you to maximize efforts toward reinforcing your home's building envelope. 

Air leaks are ranked on the basis of CFM50 reduction for the amount of effort required, and the amount of material needed, to complete each air-sealing task. Owens Corning grouped the results in three categories: those that provide a “big bang for a builder’s air-sealing buck” (red); those that provide a “medium bang” (orange); and, as the return tapers off, those that provide only a “small bang” (green). Certain leaks—like vertical sheathing joints and the sheathing joints around windows and doors—required a lot of sealant for only a modest reduction in airflow, which is why they are “small bang” leaks.  READ MORE ON THIS TOPIC at Builder Online.   

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