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    Moisture Control for New Residential Buildings

    Published: Jan 2009

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    MOISTURE ACCUMULATES WHEN THE RATE OF moisture entry into an assembly exceeds the rate of moisture removal. When moisture accumulation exceeds the ability of the assembly materials to store the moisture without significantly degrading performance or long-term service life, moisture problems result. Various strategies can be implemented to minimize the risk of moisture damage. The strategies fall into the following three groups: • control of moisture entry control • control of moisture accumulation • removal of moisture. Strategies in the three groupings can be utilized in combination and have been proven to be most effective in that manner. Strategies effective in the control of moisture entry, however, are often not effective if building assemblies start out wet and, in fact, can be detrimental. If a technique is effective at preventing moisture from entering an assembly, it is also likely to be effective at preventing moisture from leaving an assembly. Conversely, a technique effective at removing moisture may also allow moisture to enter. Balance between entry and removal is the key in many assemblies.

    Author Information:

    Lstiburek, Joseph
    Building Science Corporation,

    Committee/Subcommittee: E06.22

    DOI: 10.1520/MNL11557M