The goal of interior foundation drainage is to manage any bulk water entry into the crawl space from either foundation wall penetrations or hydrostatic (ground water) pressure. Interior drainage usually consists of a French drain along the perimeter walls, fed to a sump pump and sent through a discharge line away from the hone 10-12 ft. from the foundation. Keep in mind that not every home needs interior foundation drainage, our Home Performance Advisors will do a thorough inspection your basement and/or crawl space to verify if drainage is necessary.