French drains and yard drainage
If water sits in your yard for days after a storm, or pools against the slab, a drainage fix can save your lawn and protect your foundation. Here is how French drains, surface drains and regrading work on flat Fort Bend lots.
(832) 471-8184 or request a free inspection
Why Fort Bend yards hold water
Two things work against you here. First, much of the area is very flat, so water has little natural slope to run off. Second, the clay soil drains slowly. Once it’s wet, water sits on top instead of soaking in. Add heavy Gulf Coast rain, lots of new construction with thin topsoil over compacted clay, and gutters that empty right next to the slab, and you get soggy lawns, mosquito puddles and water against the foundation.
Signs you have a drainage problem
- Standing water that lasts more than a day after rain
- Water pooling against the slab or flowing toward the house
- Soil washing out from flower beds or under the edge of the slab
- Moss, algae or dead patches of grass in low spots
- Downspouts that dump water at the foundation
- Musty smells or moisture in the garage after storms
The main fixes
French drains: A trench lined with fabric, partly filled with gravel, with a perforated pipe that collects water from the soil and carries it to an outlet. Best for spots where the ground stays saturated.
Surface drains and catch basins: Grates set at low spots connected to solid pipe, which quickly move surface water and downspout runoff away. Often the most effective fix on flat lots.
Downspout tie-ins: Running gutter downspouts into buried solid pipe so roof water is carried well away from the slab instead of soaking the soil next to it.
Regrading: Reshaping soil so the ground slopes away from the house for several feet. Sometimes it’s the simplest fix of all.
Channel drains: Narrow grated drains in driveways or patios where concrete slopes toward the house or garage.
A good drainage plan often combines several of these. A specialist should walk your yard, ideally talk through what you’ve seen during storms, and show you where the water will go before quoting.
Drainage and your foundation
On expansive clay, moisture swings cause foundation movement. Soil that’s soaked on one side of the house and bone-dry on the other pushes and pulls the slab unevenly. Good drainage keeps moisture more even around the foundation. That’s why many foundation specialists recommend drainage work alongside, or instead of, pier repair. If you already see cracks or sticking doors, ask for a foundation inspection as well.
Questions to ask an installer
- Where exactly will the water discharge, and is that allowed by the city or HOA?
- What pipe size and type, and how much slope will the pipe have?
- Will you use filter fabric around the gravel, so the drain doesn’t clog with silt?
- What happens to sod, beds and concrete you have to cut through? Is restoration included?
- Is there a warranty on workmanship?
Cost
Drainage is usually priced per linear foot plus outlets, basins and restoration. Typical published ranges for the Houston area are in our cost guide. A short run to fix one low spot costs far less than a whole-yard system.
Common questions
Do I need a French drain or a surface drain?
A surface drain (catch basins with solid pipe) collects water that runs across the ground, like at the low spot of a yard or the end of a downspout. A French drain (perforated pipe in a gravel trench) collects water soaking through the soil. Many Fort Bend yards need a mix of both, plus better gutter discharge. A drainage specialist can tell you which after watching how water moves on your lot.
Will fixing drainage protect my foundation?
It helps a lot. Water pooling against the slab, then drying out in the summer heat, makes clay swell and shrink unevenly under your home. Moving water away from the house keeps soil moisture steadier. Drainage won't fix a slab that has already dropped. That takes foundation repair.
Where does the water go?
It has to go somewhere lower: usually the street, a curb outlet, or an approved drainage area. Many subdivisions and HOAs have rules about where you can discharge, and you can't send it onto a neighbor's lot. A good installer plans the outlet before digging.
How long does installation take?
Most residential drainage jobs take one to three days, depending on how many feet of trench are needed and whether concrete or landscaping must be cut and restored.
Do I need HOA approval?
Often, in master-planned communities like Harvest Green and other Fort Bend subdivisions. Check your HOA guidelines before work starts, especially if the drain will outlet at the curb.
Related
Fort Bend Foundation Repair is a referral service. We connect homeowners with independent, local foundation and drainage specialists. We don't perform repairs ourselves.