Basement walls in Detroit take a beating from freeze-thaw cycles. A small crack that appears in fall becomes a leak by spring if water gets in and ice expands it. We inspect, measure, and classify each crack, then inject or seal it with the right material so it stops moving and stops letting water through. Free assessment, written quote.
Polyurethane or epoxy injection matched to the crack
Free assessment, written quote, firm schedule
Small now, structural later
Why Injecting Cracks Beats Waiting
Foundation cracks start small. A hairline running vertically down a poured wall, a thin horizontal line near the top of a block wall. In Detroit's climate, that crack is a countdown timer. Winter brings water, frost expands it, and by spring you have a leak that stains the basement floor and threatens the slab.
We look at each crack and decide what it is: vertical shrinkage (routine), horizontal pressure (structural), dry or weeping, stable or active. That classification determines the fix. A dry vertical hairline gets sealed at the surface. A weeping crack gets polyurethane injected through ports so the material reaches full depth and bonds the concrete back together.
When we see a horizontal crack or one that changes width through the seasons, we flag it for structural foundation repair instead of just patching it. We also pair crack repair with basement waterproofing when the outside of the wall is at risk, and we coordinate with other foundation work if you are doing more than one thing.
Recent work
The repair sequence
How Crack Injection Gets Done in Detroit
Measure and classify the crack
We photograph, measure, and classify each crack as vertical or horizontal, dry or weeping, stable or active. This tells us whether the crack is cosmetic shrinkage or a sign of movement.
Route and prepare the surface
The crack is routed to a clean profile where needed, dust and loose material are removed, and injection ports are drilled at the right spacing so the polyurethane or epoxy reaches the full depth.
Inject the material through ports
Polyurethane is injected for active or weeping cracks because it flexes and expands on contact with water. Epoxy is used for dry cracks where a rigid structural bond is the goal.
Trim ports and verify the seal
After curing, injection ports are trimmed flush, the wall is cleaned, and the repair is inspected to confirm the crack is sealed. We document the work in your quote.
Red flags we watch for
When Crack Repair Isn't the Right Answer
Not every crack is a simple injection. Horizontal cracks that run across a wall, stair-step cracks in block, or cracks that widen and narrow with the seasons all point to the wall being pushed or pulled by soil pressure, water pressure, or settlement. Those are structural problems, not cosmetic ones.
When we see those patterns, we stop and refer you to underpinning or foundation repair depending on whether the footing or the wall is the issue. We quote that work separately and don't inject over a structural problem. It saves you money in the long run because you fix the cause, not just the symptom.
Hairlines versus horizontals, polyurethane versus epoxy, and when to call for structural help.
Most do, even hairline ones, because once water gets in and the freeze-thaw cycle takes over, a cosmetic crack becomes a leak. Sealing or injecting it early is much cheaper than fixing it after it has opened up.
Polyurethane is flexible, expands on contact with water, and is our default for active or weeping cracks. Epoxy is rigid and structural, used when bonding the two sides of the crack permanently is the goal. We choose based on the crack.
Yes, most cracks are injected from the inside through ports drilled into the wall, which avoids excavation. Exterior repair is reserved for cases where outside conditions are causing the crack or where pairing with waterproofing is the right call.
Usually yes. Horizontal cracks suggest the wall is being pushed by soil pressure or water; that is a structural issue and gets referred up to foundation repair. Vertical hairlines are usually just shrinkage and routine to fix.
A typical injection takes a few hours and the crack is sealed by the end of the visit. Larger or multiple cracks may take a day. The timeline is in the written quote so you know up front.
Homeowner reviews
What Detroit Homeowners Say About Their Crack Repairs
Hairline crack started weeping last spring. Injected from inside in one visit, sealed up properly, and it has stayed dry through the next season. Cheap and done.
H. W.
Detroit
★★★★★
They flagged one of my cracks as horizontal and recommended a structural look instead of just injecting. Could have charged me, didn't. That kind of honesty is rare.
I. R.
Sterling Heights
★★★★★
Three vertical cracks injected in one visit. No mess, no fuss, no return leaks. Quote was firm, work was clean, ports trimmed off so you barely see them.
P. N.
Warren
★★★★★
Classified each crack on the wall and only repaired the ones that needed it. The rest were stable shrinkage and didn't need a thing. Saved real money.
V. L.
Ann Arbor
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Describe the cracks you see, where they are located, their size, and whether they leak. We will inspect the wall at no charge and provide a written quote for any repair work needed.
