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The water comes back every storm. So does the guy who never finished.

Standing water and a wet basement are a grading and discharge problem before they are a French drain problem. We diagnose where the water actually goes, price the fix as one fixed number, and finish the scope we signed.

Window Well Drainage in Edwardsville, IL

Direct answer: A window well is a hole against the foundation with a window at the bottom of it. When its drain works, water passes through and leaves. When the drain clogs — which is the normal end state for an uncovered well — the well fills, and a basement window is not built to hold back standing water. Most fixes here are inexpensive, and the failure they prevent is not.

How window well drainage is supposed to work

Under the gravel at the bottom of a properly built well there is a vertical drain, tied either into the footing drain or into a dedicated line. Water entering the well passes down through the gravel, into that drain, and away. The gravel is not decorative — it is the filter that keeps the drain open.

Two things end that arrangement. Leaves, silt and mulch wash in and fill the void spaces in the gravel until nothing percolates. Or the well drain was tied into a footing drain that has since blinded, so the water has nowhere to go once it gets down there.

What fixes a window well that floods

A clear cover is the highest-value item in the category. It keeps rain, leaves and debris out of the well entirely, which means the drain below stops silting and the well stops being a collection basin during storms. It is inexpensive and it addresses the cause rather than the symptom.

Beyond that: dig out and replace the fouled gravel, re-establish or re-route the well drain, and check the grade around the well so surface water is not being delivered into it. Where a well has no drain at all — common on older additions — one has to be cut in and connected to somewhere lower.

Window well work and cost

WorkCost rangeTimeline
Clear polycarbonate cover$150 – $450 per wellSame day
Excavate and replace gravel$350 – $900 per wellHalf a day
New well drain tied to a lower outlet$900 – $2,6001 – 2 days
Regrade the surface around the well$400 – $1,500Half a day

Edwardsville and Madison County. Wells connected to a blinded footing drain may need that addressed first.

Why a flooding well is worth acting on quickly

A basement window is a weather seal, not a dam. A well holding a foot of water applies steady pressure to a frame and glazing designed for neither, and the failure mode is not a slow drip — it is the window giving way and delivering the whole well into the basement at once.

It is also one of the few drainage problems that can be inspected in five minutes. Look into each well after the next storm. If water is standing in the bottom an hour later, that well's drain is not working.

Window well drainage questions

Why does my window well fill up with water?

Almost always because the drain beneath the gravel has silted shut, or because it ties into a footing drain that has itself blinded. Leaves, mulch and fine soil wash into an uncovered well and fill the void spaces in the gravel until nothing percolates. Surface grade delivering runoff into the well makes it fill faster.

Do window wells need a drain?

Yes, unless the well is fully covered and no water reaches it. A well is an excavation against the foundation with a window at the bottom, so without a working drain it collects and holds water directly against a component that was never designed to resist it. Older additions sometimes have wells with no drain at all.

Are window well covers worth it?

They are the best value in this category. A clear polycarbonate cover keeps rain, leaves and debris out of the well entirely, which stops the drain silting and stops the well acting as a collection basin during storms. At $150 to $450 per well it is preventive rather than corrective, which is unusual for drainage work.

Can water in a window well break the window?

Yes, and that is the reason to treat it as urgent. A basement window is a weather seal rather than a structural barrier, so a well holding standing water applies sustained pressure to a frame and glazing not designed for it. When it fails it does so all at once, emptying the well into the basement.

What we put in writing before anyone digs

  • Fixed-price written quote before we break ground. Trenching turns up surprises; the price does not move because of them unless you approve a change order in writing first.
  • Zero-obligation site visit. If the honest answer is that the water is doing what water should do and you do not need a drain, that is the answer you get, in writing, at no cost.
  • The diagnosis names where the water comes from before it names the product. Grading, downspout discharge, and the water table get checked first; a French drain is a conclusion, not an opening bid.
  • Full-width trench, wrapped stone, and rigid perforated pipe as standard. We do not install narrow single-pipe trenches or pre-socked corrugated sections, because those are the installs that fail in year three.
  • Itemized scope showing linear feet, trench depth, stone volume, and discharge point as separate lines. No lump-sum 'drainage work.'
  • A named discharge point on the plan, with the permit or easement dependency listed separately so you can see which clocks we do not control.
  • If the system does not move water after the first heavy rain, we come back and correct it at our cost, not yours.

Related drainage pages

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