Interior Drain Tile · Chicago & Suburbs
When the whole basement seeps, the fix runs under the floor
Water showing up along the floor edges after rain is not a crack problem — it is Chicago's clay holding water under and around your foundation with nowhere to go. Interior drain tile collects that water at the footing, under the floor, and moves it to a sump before it ever reaches your basement. We have been installing these systems since 1986.
Interior drain tile is perforated drainage pipe installed under the basement floor along the footing; it collects the groundwater that Chicago's clay soil presses against a foundation and routes it to a sump pump before it can enter the basement. It is the proven fix when water appears along floor edges or in several places after rain. Forever-Dry has installed these systems since 1986, with a lifetime transferable warranty.
Warning Signs
Signs your basement needs drain tile
- ▸Water seeping in where the floor meets the wall after storms
- ▸Damp or wet floor in more than one area of the basement
- ▸Leaks that keep appearing in new places after each repair
- ▸A persistent musty smell even when the floor looks dry
- ▸Water rising through floor cracks during long wet spells
Our Process
How an interior drain tile installation works
Free inspection first
Not every wet basement needs drain tile, and we say so when it does not. We trace where the water enters, check the footing and floor, and confirm the pattern is hydrostatic pressure — clay-held water pushing up and in — before recommending a system.
Perimeter trench at the footing
We open the floor along the affected perimeter and set drain tile beside the footing, below floor level — at the exact depth where water builds before it enters. This is the classic, proven configuration for Chicago's non-draining clay soils.
Connected to a working sump
Drain tile is only as good as where it sends the water. The system drains to a properly sized sump pit and pump, with a discharge line that carries water out and away from the foundation instead of letting it soak right back down.
Floor restored, warranty in writing
The trench is closed with new concrete, and the system carries our lifetime warranty — transferable to the next owner when you sell. A drain tile system done right should be the last waterproofing decision that basement ever needs.
The Local Picture
Why drain tile is the answer to Chicago clay
Chicagoland sits on dense blue clay left by the glaciers, and it drains so poorly that rainwater effectively stores itself in the ground beside your house. After a cloudburst, that saturated clay presses water against the foundation walls and up beneath the floor slab for days. This is hydrostatic pressure, and no wall coating or single crack repair can hold it back everywhere at once. Drain tile takes the opposite approach: instead of trying to out-muscle the water, it gives the water an easier path — into the tile, to the sump, and out of the house.
The flat grade across most of Chicago and the south suburbs makes it worse: with almost no natural slope, water has nowhere to run off, so it goes straight down beside the foundation. And during the region's heaviest storms, neighborhoods on combined sewers can see water backing toward the house at the same time groundwater is rising under it. An interior drain tile system with its own sump and discharge keeps your basement's defense independent of how the street is doing — which, in a Chicago downpour, is exactly what you want.
Lifetime warranty, transferable to new owners
Straight Answers
Drain tile questions Chicago homeowners ask
What is drain tile, exactly?
Despite the name, it is perforated drainage pipe, not tile. Installed under the basement floor alongside the footing, it collects the water that saturated clay pushes toward your foundation and carries it to a sump pit, where the pump sends it out and away from the house. The water still arrives — it just never reaches your basement.
How do I know I need drain tile and not just a crack repair?
The pattern tells the story. Water from one identifiable crack in an otherwise dry basement usually means injection repair is enough — and when that is the case, we say so. Water along the floor edges, in multiple spots, or rising through the slab after rain means the clay is pressing water under the whole foundation, and a perimeter system is the fix that lasts.
Interior or exterior drain tile — which is better?
Interior systems are installed under the basement floor and are the practical, proven choice for most existing Chicago homes — no full excavation of the yard, effective against water rising under the slab, and serviceable through the sump. Exterior work has its place, especially when walls themselves need waterproofing, and we do that too. The inspection determines which your house needs.
Does drain tile work in a finished basement?
Yes. The system runs beneath the floor at the perimeter, and installation is planned around what is above it. If you are planning to finish the basement, putting drain tile in first is the right order — it is the difference between finishing a basement once and finishing it twice.
Will the system need maintenance?
The tile itself is passive and buried — there is nothing to switch on. The working part is the sump pump, which is a mechanical device and should be checked like one, especially before spring. A system that drains to a proper pit with a sound pump and clear discharge line is a set-it-and-check-it arrangement, not a chore.
Is the work covered by your warranty?
Yes — drain tile systems carry our lifetime warranty, and it transfers to the new owner if you sell the house. We have been standing behind that promise since 1986, which is also the plainest evidence that these systems, done correctly, keep working.
What does an interior drain tile system cost?
It is priced by the job — mainly the length of perimeter involved — so an honest number requires seeing the basement. The inspection is free, the price is exact and in writing, and if a smaller repair would genuinely solve your problem, that is the one we will quote.
Find out what the water under your floor is doing
A free inspection that traces where the water comes from, a plain verdict on whether drain tile is the right fix, and an exact written price — with a lifetime transferable warranty on the work.
Or call (708) 423-2800