What color facing paper is used for gypsum wallboard that will withstand moisture?

The color of the facing paper used for gypsum wallboard designed to withstand moisture is green. This specific green-faced gypsum board, often referred to as "green board," is treated with additives that make it resistant to moisture. It is commonly used in areas that are prone to humidity, such as bathrooms and kitchens, where standard gypsum board might be susceptible to water damage.

Green board helps prevent issues like mold and mildew growth, making it suitable for environments where moisture is a concern. The distinction in color serves as an easy visual identifier, allowing builders and contractors to select the appropriate material for moisture-laden areas without having to examine the specifications in detail.

Other colors, like blue, white, and gray, are generally associated with different types of drywall or are suitable for other applications that do not require the same level of moisture resistance. Thus, knowing the purpose of the green facing paper aids in ensuring the durability and longevity of the wall materials in moisture-prone environments.