What is the primary function of foundation drainage?

The primary function of foundation drainage is to remove "free water" from the foundation's perimeter. Effective drainage systems are designed to prevent water accumulation around the foundation, which can lead to various issues such as hydrostatic pressure, soil saturation, and potential water intrusion into the basement or crawl space. By mitigating water buildup, the drainage system helps ensure that the foundation remains stable and dry, ultimately protecting the structural integrity of the building.

Removing excess water is crucial because when water is allowed to pool around the foundation, it can weaken the soil and lead to settling or shifting. This can cause cracks in the foundation and compromise the overall safety of the structure. Therefore, a well-designed foundation drainage system is essential for maintaining a dry environment around the foundation and preventing water-related damage.