You've got a wet spot. You've started reading, and now you're staring at three terms — French drain, surface drain, and field tile — that all promise to fix it. Which one do you actually need? The honest answer is that they solve different problems, and picking the wrong one means spending money and still having a wet spot.
The good news: the difference is simple once you know what each does. It all comes down to one question — where is the water? On top of the ground, or down in the soil? Get that right and the choice usually makes itself. Here's the plain-English version.
The One Question That Decides It
Every drainage fix is answering one of two situations:
- Water on top of the ground — it ponds, it runs off slow, it sits in a low spot after a rain and eventually soaks in or evaporates. This is a surface problem.
- Water down in the soil — the ground is soggy, spongy, saturated; the surface might not even have standing water, but it squishes and won't dry, and the grass struggles. This is a groundwater problem.
Surface drains move water from on top. French drains and tile pull water from below. Match the tool to where the water is, and you've solved 90% of the puzzle.
Surface Drain — For Water Sitting On Top
A "surface drain" is really a family of fixes: a catch basin or yard inlet that swallows ponded water and pipes it away, a channel drain across a driveway, a graded swale that carries runoff to a ditch, or simply regrading the ground so it sheds water in the first place. What they have in common is they deal with water before it soaks in.
Use it when: water visibly runs in from somewhere uphill and ponds; a downspout dumps and the water sheets across the yard; a flat or back-pitched lawn holds puddles for a day or two and then clears. If the fix is "give the water on top a faster way off," that's surface drainage — and often the cheapest, because sometimes it's just grade work with no pipe at all. We cover the full menu on our yard and field drainage page, and the regrade side on our grading work.
French Drain — For Saturated Ground Near The House
A French drain is a perforated pipe laid in a gravel-filled trench. Water in the surrounding soil seeps into the gravel, finds the pipe, and gets carried off to an outlet. It's the right tool when the problem is water in the ground rather than on top of it — a chronically soggy corner, water collecting against a foundation, a wet basement fed from outside, the base of a slope that stays wet.
Use it when: the ground stays spongy with no obvious standing water; the basement seeps after wet stretches; a retaining wall or foundation holds water against it. A French drain is the go-to for yards, foundations, and short runs around the buildings. Full detail on our French drain installation page — including foundation and footing drains, curtain drains, and downspout tie-ins.
Field Tile — The Same Idea, At Field Scale
People hear "tile" and "French drain" and think they're different animals. They're not — field tile is the same concept (perforated pipe pulling groundwater out of the soil) scaled up for big areas. Tile runs longer, usually deeper (3–4 feet), gets laid in patterns across a field, and ties into a main that carries the combined water to an outlet. It's how Illinois farm ground gets dry enough to plant and work in the spring.
Use it when: a whole field or a large wet area won't dry; the ground farms wet every spring; you want to lower the water table across acres, not just one corner. New systems are our field tile installation work. And when an existing tile system has quit — a line collapsed, an outlet blew out, a spot that used to drain suddenly ponds — that's a repair, covered on our field tile repair page.
Quick Comparison
- Surface drain → water on top → catch basins, channel drains, swales, regrading → yards, drives, lots.
- French drain → groundwater near structures → perforated pipe in gravel, shorter and shallower → yards, foundations, basements.
- Field tile → groundwater across big areas → perforated pipe, long and deep, tied to a main → fields and large wet ground.
Most Real Jobs Are A Combination
Here's what the single-answer guides leave out: a lot of wet spots are both a surface and a groundwater problem. Water ponds on top and the ground underneath is saturated. The right fix in that case isn't picking one tool — it's a surface inlet or regrade to get the ponded water off the top, plus a French drain or tile underneath to pull the saturated line down. Reading which mix a property actually needs is the whole job.
That's why we don't try to diagnose a wet spot over the phone or sell one fix sight-unseen. The umbrella for all of it — surface, subsurface, fields, and structures together — is our water management approach: look at the whole property, find where the water comes from and where it can go, and match the fix to the water.
How To Tell Before You Call
- Watch it after a rain. Standing water on top points to surface drainage. Spongy, saturated ground with no puddle points to a French drain or tile.
- Note the scale. A yard corner or a foundation is French-drain territory. A field or a large wet area is tile territory.
- Check whether it used to drain. Ground that recently started ponding often means a failed existing tile or buried outlet, not a new system.
- Find the outlet. Whatever the fix, the water has to end up somewhere lower — a ditch, a creek, a daylight spot. No outlet, no drainage.
Bottom Line
French drain, surface drain, and field tile aren't competing products — they're three tools for three situations, sorted by where the water is and how much ground you're draining. Water on top wants surface drainage; saturated ground near the house wants a French drain; a wet field wants tile. And plenty of real jobs want a combination, which is exactly what a quick look at the ground tells us.
We do drainage work across the 60-mile radius from Mattoon — Charleston, Effingham, Champaign, Decatur, Sullivan, Tuscola, Shelbyville, Pana, Terre Haute, and everywhere in between. Call or text (217) 809-0779, and we'll walk your wet spot and tell you straight which fix it actually needs.