Which material is typically used for waterproofing foundations?

The material commonly used for waterproofing foundations is plastic sheeting. This choice is favored because it is lightweight, versatile, and provides an effective barrier against moisture. When applied, plastic sheeting creates a protective layer that prevents water from penetrating the foundation walls and causing structural damage or mold growth. This barrier is especially important in areas with high groundwater levels or heavy rainfall, where moisture intrusion can compromise the integrity of the building.

Wood, while a traditional building material, is not suitable for waterproofing because it can absorb moisture and degrade over time. Cement board, often utilized for various construction applications, does not serve the primary function of waterproofing. Fiberglass may offer some moisture resistance but is not typically used specifically for foundation waterproofing. Thus, plastic sheeting stands out as the most appropriate material for this crucial application.