Question: Is it acceptable to use interior paper-faced gypsum board in exterior applications if it is covered with a weather-resistant barrier, such as housewrap?
Answer: No. According to the general explanatory notes found in the GA-600 Fire Resistance and Sound Control Design Manual, labeling a gypsum system as an “interior partition” for example does not automatically limit it to interior use. The interior partition designation primarily refers to the context in which the system was originally tested or is most commonly used and not a strict limitation of its use.
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