French Drain Repair McDonough GA

When French Drain Repair Is the Right Call

French drain repair in McDonough starts with finding where the water stops: at the outlet, inside the pipe, or in the stone and fabric around it. Each failure has a different fix and a very different price, so a good repair begins with diagnosis, not digging. If the drain never solved the problem even when new, that's a design issue, and french drain installation done properly is the better path.

Henry County drains face a specific enemy. Cecil red clay is fine-grained and sticky, and wherever it touches the stone without a good filter fabric between them, it slowly migrates into the voids. Our local research found that red clay drains built without proper fabric or enough gravel depth commonly fail within two to three seasons. Many repair calls are really that slow silting showing up.

Common Failures and What Fixes Them

Buried or crushed outlet

The single most common fault. Sod, mulch or a new bed covers the pipe end, or a mower flattens it. Digging out the end, adding a rigid outlet with a grate or rock pad, and marking it usually restores flow the same day.

Sediment or roots in the pipe

Leaves through an open inlet, grit, or fine roots from nearby shrubs build up inside. Jetting from a cleanout or the outlet clears it, and a camera confirms the line is open end to end.

Silted stone and fabric

Clay has packed the gravel, so water can't reach the pipe even when the pipe is clear. Jetting can't fix this; the affected length has to be dug out and rebuilt with clean stone fully wrapped in non-woven fabric.

Crushed or sagging pipe

Thin corrugated pipe under a driveway edge or a trailer path collapses, or a soft spot in the trench lets a section sag and hold silt. That length gets replaced with stronger pipe on a firm, sloped bed.

Lost slope

Settlement or a rushed install leaves part of the run flat or uphill. The fix is relaying that stretch so the pipe falls at least 1 percent, about 1/8 inch per foot, toward the outlet.

Capped drain pipe outlet at the base of a block retaining wall, with a downspout line ending on a splash block above — Pipe ends at the base of a block wall. An outlet like this is the first place to look when a drain stops working, because it's easy to bury or crush.

French Drain Repair Costs

Repair costs range from a few hundred dollars for an outlet or jetting fix to the price of a new drain for a full rebuild. HomeAdvisor puts hydro jetting a drain line at an average of $475, with most jobs between $350 and $600, and a camera inspection at roughly $275 to $1,800. Dug repairs are priced by the foot.

Repair	Typical price	Source
Hydro jetting a drain line	$350 to $600 (avg $475)	HomeAdvisor
Camera inspection	$275 to $1,800	HomeAdvisor
Dig and rebuild a section	$25 to $40 per foot	Bucktown Grading (GA exterior rate)
New outlet or daylight end	$150 to $450	RW Lawn Co (Metro Atlanta)

The camera often pays for itself. Without it, a crew may dig up 80 feet of lawn to find a 10-foot problem. With it, the bad section is marked from the surface and only that stretch is opened.

Example project

Side-yard french drain that quit after four years

Setting: an 80-foot drain along the side of a McDonough house, installed when the yard was regraded. It worked at first; now the side yard is soggy again and the outlet stays dry in storms.

Diagnosis: the outlet is found under sod and mulch. Once uncovered, a camera from the outlet shows the last 20 feet of pipe half full of red clay silt, with clean pipe beyond.

Likely repair: rebuild the 20-foot silted stretch with clean stone wrapped in non-woven fabric, add a rigid outlet with a rock pad, and jet the rest of the line.

Budget guide: 20 feet at $25 to $40 per foot is $500 to $800, plus about $275 or more for the camera and $350 to $600 for jetting, per the sources above.

An illustrative example of a typical job, not a specific customer's project.

How a French Drain Gets Diagnosed and Repaired

Muddy trench reopened along a wooden fence with water standing in the bottom — A trench reopened along a fence line. Standing water in the bottom shows the soil around it isn't letting water reach a working pipe.

Find both ends. Locate the inlet or cleanout and the outlet; probe or use a locator if they're buried.
Flow test. Run a hose into the top and time how long it takes to appear at the outlet, if it appears at all.
Camera the line. Push a camera from the outlet or cleanout to find silt, roots, crushing or flat spots, and mark them on the surface.
Clear what can be cleared. Jet out loose sediment and roots, then re-test.
Dig the bad section. Call Georgia 811 at least three business days ahead, then open only the marked stretch.
Rebuild it right. Line the trench with non-woven fabric, bed new pipe in clean washed stone at a steady 1 percent fall, wrap the fabric over the top, and restore the sod.

French drain repair reference diagram for McDonough GA: perforated pipe in washed stone wrapped in non-woven fabric in Georgia red clay — What a rebuilt section should look like inside: clean stone, fabric wrapping all of it, and a pipe that falls steadily to a daylight outlet.

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French Drain Repair in McDonough: FAQs

How do I know if my french drain is clogged? +

The clearest sign is a dry outlet during a heavy storm while the area the drain was built for is wet again. Other signs are a soggy strip of lawn running along the drain line, water sitting in a cleanout, and small holes or sinking spots above the trench where soil is washing into the pipe.

How much does french drain repair cost? +

It depends on what failed. Hydro jetting a drain line averages about $475, within a $350 to $600 range, and a camera inspection runs about $275 to $1,800, per HomeAdvisor. Replacing a failed section is priced like new exterior drain, about $25 to $40 per linear foot in Georgia, so a 20-foot repair and a full rebuild are very different numbers.

Can you unclog a french drain without digging? +

Sometimes. If the pipe is clogged with leaves, roots or loose sediment, flushing from the cleanout or the outlet with a jetter can open it without a shovel. If the stone around the pipe is packed with clay, or the pipe is crushed or has lost its slope, jetting won't last and the bad section has to be dug up.

How long does a french drain last? +

A well-built one, with filter fabric around clean stone and a clear outlet, can work for decades. Lifespan comes down to how it was built far more than its age, which is why a drain that fails young usually needs a partial rebuild rather than another cleaning.

Should I repair or replace my french drain? +

Repair when the problem is local: a blocked outlet, one crushed section, a root mass at one spot. Replace when the camera shows silt along most of the run, when the original trench had no fabric, or when the drain was never deep enough to catch the water in the first place. Patching a drain with the wrong design just pays for the same failure twice.

Can I repair a french drain myself? +

You can handle the outlet and the flushing: uncover a buried pipe end, clear it, and run a hose through from the top. Digging is a bigger step. Georgia law requires a Georgia 811 request before any excavation, and Henry County requires a land disturbance permit once digging or grading passes 120 square feet, which a long trench rebuild can exceed.