A HOLISTIC EXAMINATION OF WALL ASSEMBLY PERFORMANCE

摘要

Building scientists and other experts agree: no matter how tightly a building is constructed, no matter how well it's insulated, no matter what type of exterior cladding is chosen and how expertly it's installed, moisture will always find a way into the building enclosure. Moisture infiltration can undermine structural integrity, cause exterior surfaces to deteriorate, and shorten the life of paints and stains. Moisture can also foster mold and rot that not only cause structural damage to multi-family buildings but also pose serious health hazards. For example, a moisture content pushing 28% exceeds the accepted content of 22%. If sustained, this will inevitably result in fungal decay. New studies have pushed this number lower suggesting that mold can grow on wood at levels above 15%.