A French drain is an excellent tool for managing surface water and “perched” groundwater, but it is not a complete waterproofing solution for a basement. Without a proper vertical barrier (like a liquid membrane) and a way to handle deep hydrostatic pressure, water can still migrate through the concrete. At Basement Expert, we view French drains as one component of a larger Active Water Diversion system. We ensure your drainage is NDS-certified and integrated with your foundation protection for a truly effective, site-specific solution.