How to Install a French Drain for Effective Yard Drainage

Standing water is the silent enemy of your home's foundation and your landscape's health. A French drain is the gold standard for diverting this excess water, turning a soggy, unusable patch of mud into a dry, stable area. It works by giving groundwater the path of least resistance—a bed of gravel and a perforated pipe—to carry it safely to a daylight outlet or a dry well. Building this right requires precision in your slope. If the trench isn't graded correctly, water won't move, and you'll just have a pipe full of stagnant mud. When you do it well, you create a permanent, invisible solution that handles even the heaviest rainfall without breaking a sweat.

Map Your Water's Escape Route. Mark the trench line with spray paint, ensuring it runs from the wet area to a lower point or discharge location. Dig a trench at least 12 inches wide and 18 to 24 inches deep, maintaining a downward slope of at least one inch for every eight feet of length.
Block Silt Before It Clogs. Line the entire trench with heavy-duty geotextile landscape fabric, leaving enough excess on the sides to overlap and cover the top later. This prevents soil and fine sediment from migrating into the gravel and clogging your pipe.
Bed Your Pipe on Stone. Pour 3 to 4 inches of clean, washed drainage gravel into the bottom of the lined trench. Level this layer out to provide a solid, permeable bedding for the pipe.
Holes Down, Water Flows. Place the perforated pipe on the gravel bed with the holes facing downward. Connect segments using snap-on couplers and ensure all connections are tight.
Seal the System Tight. Backfill the trench with drainage gravel until it reaches within 4 to 6 inches of the ground surface. Fold the excess landscape fabric over the top of the gravel to encase the entire drainage system.
Vanish Your Trench Line. Fill the remaining space to the surface with high-quality topsoil. Compact it slightly and finish with grass seed or sod to blend the area back into your lawn.