French Drain Installation in Portland, Wilsonville & Lake Oswego

At Foundations First Northwest, we install French drains for homes across the Portland Metro, Oregon Coast & Surrounding Areas. These drainage systems help protect your foundation by moving water away from the home before it creates moisture issues. We install French drains in crawl spaces, basements, and exterior areas based on where the water is entering and where it needs to go.

What Is a French Drain?

A French drain is a perforated pipe surrounded by gravel that collects water and carries it away from your foundation. As groundwater builds up, it enters the pipe through small openings and flows to a discharge point. This helps reduce hydrostatic pressure around the foundation and lowers the risk of water damage in basements and crawl spaces.

Crawl Space Drainage Systems

Crawl space French drains are designed to collect standing water and keep moisture from lingering under the home. We plan the route based on how water moves through the crawl space and install the drain so it consistently flows toward the discharge point. When installed correctly, the system helps keep the crawl space drier and reduces the conditions that lead to wood rot, odors, and long-term foundation concerns.

Basement Perimeter Drains

Basement perimeter drains are typically installed along the inside edge of the basement to capture water before it reaches finished areas. The drain directs water to a sump pump or approved discharge location. This approach is often used when water pressure is building around the foundation wall and pushing moisture into the basement over time.

Exterior French Drains

Exterior French drains are used to manage yard drainage and reduce water buildup along the outside of the foundation. These systems are installed to collect water in problem areas and move it away from the structure. Proper placement and discharge planning matter most, especially in areas where heavy rain and saturated soil are common.

Water pressure and saturated soil can create real problems for foundations. Over time, moisture around the home can contribute to cracking, shifting, and ongoing damp conditions in basements and crawl spaces. A French drain helps by intercepting water before it reaches the foundation, reducing pressure and keeping the area around the home more stable.