Regular drywall, also known as standard drywall or gypsum board, is not recommended for use in areas with high humidity and moisture, such as bathrooms. Standard drywall is composed of a gypsum core covered with paper, which is susceptible to damage and mold growth when exposed to moisture.
In bathrooms and other wet areas, it is advisable to use a moisture-resistant or waterproof material specifically designed for those environments. Two common options are greenboard and cement backer board:
Greenboard: Greenboard, also known as moisture-resistant drywall, is similar to standard drywall but has a water-resistant coating on the face and a moisture-resistant core. While it is more resistant to moisture than regular drywall, it is not completely waterproof and should not be used in direct contact with water or in areas prone to frequent or excessive moisture.
Cement Backer Board: Cement backer board, such as cementitious fiberboard or cement board, is a durable and moisture-resistant option suitable for bathroom installations. It is made of a combination of cement and reinforcing fibers, offering excellent resistance to moisture, mold, and mildew. Cement backer board is often used as a backing for tile installations in wet areas.
Using moisture-resistant or waterproof materials in bathrooms helps to prevent moisture-related issues such as mold growth, warping, and deterioration of the wall surfaces. It is important to follow local building codes and regulations and consult with professionals to ensure proper material selection and installation techniques for your specific bathroom project.