What is a French drain?
A French drain is a subsurface drainage system consisting of a gravel-filled trench containing perforated pipe that collects and redirects groundwater away from buildings, yards, or other problem areas.
The core of a French drain is simple: a sloped trench dug in the ground, filled with gravel, and fitted with perforated pipe that funnels water downslope to daylight or a collection point. Water seeps through the gravel into the perforated pipe rather than pooling against a foundation or creating soggy low spots in a yard.
In residential Charlotte Metro settings, French drains solve persistent wet yard problems, protect basements from hydrostatic pressure, and prevent water from undermining patios or walkways. They work best where the grade allows water to flow naturally downhill, though sump pump systems can be added in flatter terrain.
Landscape designers often recommend French drains for yards with clay-heavy soil, poor surface drainage, or homes built in swales where runoff naturally collects. The system is installed below ground and largely invisible once complete, making it a practical choice for homeowners who want to manage water without altering the look of their property.
Unlike gutters and downspouts that channel roof runoff, French drains handle water already in the soil. Many residential projects combine both systems for complete water management. A residential landscape design professional can assess your property's slope, soil type, and drainage patterns to determine whether a French drain is the right solution and where to place it for maximum effectiveness.