Lessons Learned
About 15 years ago there was a rash of problems with deteriorating walls in 1990s-era houses. The walls’ inner structures were rotting away in certain parts of the East Coast and Midwest, and these failures were ultimately traced to a combination of changes in building practices and materials at the time. The relatively new demand for more energy efficiency had led to an emphasis on more airtight building envelopes (BEs).






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