Greenboard is a type of wall panel made from a cement-based material that is designed for use in areas exposed to moisture, such as bathrooms and kitchens. It is often used as a substrate for tile installations, providing a durable and water-resistant surface. Greenboard is typically green in color, which helps to distinguish it from regular drywall. The primary advantage of Greenboard is its resistance to mold and mildew, making it a popular choice for construction and renovation projects. It is important to note that while Greenboard offers some moisture resistance, it is not completely waterproof and should not be used in areas with constant water exposure, such as showers.