Regular drywall, also known as standard or regular gypsum board, is not recommended for use in bathrooms or other high-moisture areas. This type of drywall is not moisture-resistant, and prolonged exposure to moisture can cause it to deteriorate, warp, and eventually lead to mold growth. Bathrooms are particularly prone to high humidity levels due to showers, baths, and sinks, making them unsuitable for standard drywall.
Instead, it is essential to use moisture-resistant drywall, commonly known as green board or cement board, in bathrooms and other areas prone to moisture. These types of drywall are specially designed to resist water and humidity, making them more suitable for use in damp environments. Here are the two main types of moisture-resistant drywall used in bathrooms:
Green Board: Green board is a water-resistant gypsum board with a moisture-resistant paper covering. It is suitable for areas with moderate humidity levels, such as bathrooms with proper ventilation. However, it is not entirely waterproof and should not be used in direct contact with water, such as in shower or bath surrounds.
Cement Board: Cement board is a more robust and waterproof option compared to green board. It is made of cement and reinforcing fibers, providing excellent resistance to moisture and making it ideal for use in shower and bath surrounds and other high-moisture areas.
When remodeling or building a bathroom, it is crucial to use the appropriate moisture-resistant drywall to ensure the longevity of the walls and prevent potential water damage and mold growth. Additionally, it's essential to follow best practices for sealing joints, using waterproofing membranes, and providing proper ventilation to maintain a dry and healthy bathroom environment.