Quick answer
A French drain is a trench with gravel, filter fabric and a perforated pipe that captures groundwater and moves it to a safe outlet. It helps with subsurface water and soggy lawns. It is not the same as a surface drain or catch basin, and it only works if there is slope and a legal place for the water to go.
What are you seeing?
Common Yard Drainage Problems
San Antonio's expansive clay holds water, then lets it run along the surface during heavy storms. Typical problems:
- Ponding along fences, patios or the foundation
- Soggy lawns, mosquitos and dead grass
- Downspouts that dump next to the slab
- Water flowing from a neighbor's yard onto yours
- Low corners that stay muddy for days
A drain only works if it addresses the actual source. We start with an assessment of grade, gutters, soil and where water enters.
How French Drains Work
A trench is dug on a continuous downward slope, lined with filter fabric, filled with washed gravel and fitted with perforated pipe. Water seeps into the gravel, enters the pipe and travels to the discharge. Fabric keeps silt out so the system does not clog.
- Slope: needs continuous fall; a flat trench just holds water
- Fabric and gravel: clog protection
- Perforated pipe: faces holes down in the standard install
- Outlet: must exist before we dig
French Drain Design and Installation
We locate utilities through 811, mark the route, set the grade, excavate, lay fabric, bed the pipe, backfill with gravel and restore the surface. Cleanouts or inlets are added where useful for maintenance.
French Drains vs. Catch Basins
This is the biggest gap in most online advice. A French drain handles subsurface water. A catch basin or channel drain handles surface water. Many San Antonio yards need both, especially with clay. If someone proposes one drain for everything, ask why.
- Soggy ground below the surface: French drain
- Water sheeting across the yard: surface drains or swale
- Roof runoff: gutters and downspout extensions plus buried lines
Foundation-Area Drainage
Water against the slab is a long-term risk. Our scope covers moving water away from the house. If there are signs of foundation movement, such as cracks, sticking doors or gaps, bring in a structural specialist as well.
Proper Stormwater Discharge
Where the water goes matters more than the pipe. Options include daylighting to a lower area, a pop-up emitter, a dry well where soil allows, or the curb where permitted. You cannot send it to a neighbor's property or the sanitary sewer. We confirm discharge and permit requirements with a drainage specialist before design so you are not fined or sued later.
Don't DIY this
- Dig without calling 811
- Bury pipe flat with no slope
- Skip the fabric and expect the system to last
- Discharge onto a neighbor's lot or into the sewer cleanout
- Use a French drain for surface sheeting
Call a licensed plumber instead: (210) 898-9754
Homeowner checklist
Seasonal issues in San Antonio
Peak runoff; best time to see where water actually goes.
Dry clay cracks and then swells, shifting drains and grade.
Clean gutters and install before winter rain.
Freeze is rarely an issue for buried drains but saturated soil is.
Why homeowners trust Stark Plumbing Solutions
You get a price before work starts.
We know San Antonio clay, hard water and freeze patterns.
Verify any plumber's license with the Texas State Board of Plumbing Examiners.
We protect your property and clean up.
FAQs
Does a French drain help with standing yard water?
Yes, when the water is subsurface and the site has slope to an outlet. For water standing on top of the soil, surface drains or regrading may be needed.
How is a French drain different from a surface drain?
A French drain collects subsurface water through a perforated pipe in gravel. A surface drain collects water that runs on top of the ground through a grate.
Where can collected water be discharged?
To a lower area on your property, an emitter, the curb where permitted, or a dry well where soil allows. Never to a neighbor's yard or the sanitary sewer.
How much does it cost?
Cost depends on length, depth, soil and discharge. We price after assessing.
Do you need a permit?
It depends on location and discharge. We confirm requirements before design.