Exterior drain tile, also known as foundation drain, is a perforated pipe installed around the foundation of a building to collect and redirect excess water away from the structure. It is typically made of durable materials such as PVC or corrugated plastic, and is designed to prevent water from seeping into the basement or crawl space, minimizing the risk of flooding and water damage. Proper installation and maintenance of exterior drain tile are crucial for protecting the integrity of a building’s foundation and ensuring a dry and healthy living environment.