Foundation Crack Repair · Chicago & Suburbs
A crack repair should only have to be done once
Chicago winters carve cracks into poured and block foundations, and the clay outside keeps pressing water through them every spring. Since 1986 we have repaired those cracks from the inside with epoxy injection and from the outside when the wall calls for it — and stood behind the work with a lifetime transferable warranty.
Most leaking foundation cracks in Chicago-area poured concrete walls can be permanently sealed from the inside with full-depth epoxy injection, usually without excavation; block, brick, and limestone walls typically need the repair done from the exterior. Forever-Dry has repaired both since 1986 and backs every crack repair with a lifetime transferable warranty. Inspections are free: (708) 423-2800.
Warning Signs
Signs a foundation crack needs more than paint
- ▸A vertical crack that darkens or drips during heavy rain
- ▸A repair that failed and let water back in within a year
- ▸White mineral stains (efflorescence) trailing down the wall
- ▸One that measurably widens from one year to the next
- ▸Damp carpet or musty smell along one section of wall
- ▸Stair-step patterns in block or brick foundation walls
Our Process
How we repair a foundation crack
Free inspection, honest verdict
We look at the crack, the wall it is in, and where the water outside is coming from. Then we tell you plainly whether it is a cosmetic shrinkage crack or a working leak — and if it does not need repair, we say so.
Injection repair from inside
For most poured-wall cracks, we inject the full depth of the crack so it is sealed from the soil side to the paint side. Done properly, the repair is permanent — which is why we can warranty it for the life of the home.
Exterior repair when the wall needs it
Some cracks — in block walls, brick, or limestone — cannot be honestly fixed from inside. We excavate and repair those from the exterior, sealing the wall where the water actually hits it. Forty years in, we know which repair belongs where.
A lifetime warranty in writing
Every crack repair carries our lifetime warranty, and it transfers to the next owner when you sell. The promise has been the same since 1986, and honoring it is why we only do repairs that last.
The Local Picture
Why Chicago foundations crack — and keep leaking
The ground under Chicagoland is dense glacial clay that barely drains. After every storm, water sits against your foundation instead of soaking away, pressing at the wall for days. Add our freeze-thaw winters — water in a hairline crack freezes, expands, and pries the crack a little wider every season — and you get the classic Chicago pattern: a crack that appears small in summer and leaks by spring. Sealing the surface does not change any of that, which is why hardware-store patches fail. The repair has to fill the crack to full depth and stand up to the clay's pressure.
What your foundation is made of decides the right repair. Postwar ranches in Alsip, Oak Lawn, and the south suburbs mostly have poured concrete or block walls — poured walls crack at ties and corners and take injection well, while block walls carry water inside their cores and often need a different approach. The bungalow belt and Chicago's pre-1920 homes sit on brick and limestone, which should never be treated like concrete. We have repaired every one of these wall types since 1986, so the diagnosis starts from what your house is actually built of.
Lifetime warranty, transferable to new owners
Straight Answers
Foundation crack questions we hear every week
Is a leaking foundation crack dangerous or just annoying?
Most vertical cracks in poured walls are not a structural emergency — they are a water problem. But water coming through a crack for years erodes soil, feeds mold, and ruins finished spaces, and some crack patterns do signal movement. Our inspection tells you which kind you have, in plain language, for free.
Why did the crack leak again after it was patched?
Surface patches only cover the inside face of the wall. The crack still runs the full thickness of the concrete, the clay outside still holds water against it, and the next hard rain pushes water right back through. A lasting repair fills the entire depth of the crack, not just the part you can see.
Epoxy injection or exterior repair — which one do I need?
It depends on the wall. Most poured concrete cracks can be permanently sealed from inside with injection, with no digging. Block, brick, and limestone walls usually need the repair done from the outside, where the water first hits. We recommend the one your wall actually needs — injection is the smaller job, and when it is enough, that is what we say.
Can you repair cracks in limestone or brick foundations?
Yes — that work has been part of our trade since 1986. Chicago's older housing stock sits on limestone and brick that must be repaired the way it was built, usually from the exterior. Treating those walls like poured concrete causes damage, which is why they deserve a contractor who works on them regularly.
Will the repair be visible afterward?
An interior injection repair leaves a narrow repaired seam along the crack line — tidy, paintable, and far less visible than the stains the leak was leaving. Exterior repairs are backfilled and finished at grade, so once the lawn recovers there is little to see. What matters is what stops: the water.
Does the lifetime warranty really transfer if I sell the house?
Yes. The warranty covers the repair for the life of the home and passes to the new owner at sale. That has been our standard since 1986, and for sellers it is a genuine asset — a documented, warrantied repair answers the question a home inspector would otherwise raise.
What will the repair cost?
We put an exact written price on it after a free inspection, because the honest number depends on the wall type, the damage, and whether the repair is interior or exterior. What we can promise up front: we quote the repair your foundation needs, not the biggest one we sell.
Get a straight answer about that crack
A free inspection, a plain explanation of why the crack leaks, and a written price for the repair that will actually end it — backed by a lifetime transferable warranty.
Or call (708) 423-2800