Frequently Asked Questions

A well-installed French drain in Houston clay typically runs 15 to 20 years before it needs significant work. The pipe itself, when it's rigid SDR-35 PVC and not the corrugated black tubing sold at home centers, will outlast that. What shortens the lifespan is silt and roots getting into the gravel bed over time. Drains installed near oak or pecan trees, or in heavy clay without proper filter fabric, can clog much sooner. A cleaning every 5 to 7 years extends the life considerably.

For most residential French drains in the Houston area, no. The drain stays within your property, doesn't tie into the city stormwater system, and doesn't require excavation deep enough to trigger building permits. The exceptions: if you're connecting to a public stormwater inlet, crossing a public easement, or digging near a foundation or pool, you may need approval from the city or your HOA. We handle those conversations on the jobs where they apply.

A French drain handles subsurface water, the water that's already in the soil sitting at root depth and keeping the ground soggy. A catch basin handles surface water, the water sheeting across the yard or pooling in a low spot. They solve different problems. Most full-yard drainage systems use both: catch basins to grab surface water at the low points, French drains to pull subsurface water out of saturated areas, and a shared outlet pipe carrying everything to a safe discharge point.

Heavy Houston clay holds water for days because it absorbs almost nothing and releases what it has even more slowly. If your yard is still soggy 48 hours after a storm, the ground is saturated and the water has nowhere to go. That's the textbook case for a French drain. If only the surface is wet and the ground underneath is dry, it's usually a grading problem instead. The lot was built without enough slope to move runoff off the property.

You can. We get DIY questions all the time. The trench and pipe work isn't complicated. Where homeowners get into trouble is the design: misjudging slope, picking a discharge point that's too high, skipping filter fabric, or using the corrugated black tubing that home centers sell. The black tubing crushes under clay pressure and clogs within a year or two. If you want to do it yourself, at minimum use rigid SDR-35 pipe, washed gravel, and non-woven filter fabric, and confirm a downhill outlet before you start digging.

Anytime that isn't actively raining. Most homeowners call us right after a bad storm, which is actually the worst time to dig. The ground is saturated and the trench walls collapse. We do our best work in dry conditions, which in Houston usually means late summer through fall and again in late winter. If your yard is already wet, we'll still come out and assess. We may just need to wait a few dry days before breaking ground.

For most Houston yards, the trench runs 18 to 24 inches deep. That's deep enough to intercept the saturated layer in clay and shallow enough to maintain slope across the run. Foundation drains and drains tied to a sump pump run deeper, sometimes 36 inches. Going deeper than necessary doesn't drain the yard any faster. It just adds cost and risks hitting buried utility lines.

Short-term, yes. There's a trench across the yard and you'll see it for a few weeks. We backfill with topsoil and either reseed or sod the line, and within a season it blends in. Roots are the bigger consideration. We design lines to stay outside the critical root zones of mature trees, roughly the area equal to the canopy width. Cutting through major roots can damage or kill a tree, so we'll re-route the line if a tree is in the way.

Negative grading toward the foundation is one of the most common problems we see in Houston. A French drain alone won't fix it. You also need to re-grade the soil away from the house. We usually do both on the same job: re-grade the immediate 6 to 10 feet around the foundation to push surface water away, and install a French drain at the downhill side of the slope to catch what gets through.

Yes. Many Katy, Cypress, and Sugar Land subdivisions have HOA rules about visible drainage components, pop-up emitter placement, and where water can discharge. We've worked in most of the major master-planned communities including Cinco Ranch, Bridgeland, Riverstone, Cross Creek Ranch, and Towne Lake, and can either submit plans for HOA approval or design systems that don't require it.