What kinds of concrete repair are actually worth doing?
Four kinds cover nearly every residential job we see.
Lifting settled slabs. When a walkway panel or a driveway section has dropped because the soil under it washed out, the concrete itself is often perfectly good. Material gets pumped through small holes to fill the void and float the slab back to level. It is finished the same day and costs a fraction of replacement.
Crack repair. Cracks that are stable and level get cleaned out and filled with a flexible sealant so water stops getting underneath, which is what turns a hairline into a hole over a few winters. Wider structural cracks can be stitched across.
Resurfacing. A slab that has scaled but is still structurally sound can take a thin overlay bonded to the old surface. This works well on porches and walks. It works badly on anything that moves, so the assessment underneath matters more than the product.
Trip hazards. Where two sections meet at different heights, the lip can be ground down or the low side lifted. Both beat living with it, and if the walk runs along the street, the town's public works department can tell you which side of the property line the responsibility sits on.
When is concrete worth repairing?
The question to ask is where the damage came from. Damage that happened at the surface, whether scaling from salt, a chipped corner, a shallow crack or staining, sits on top of sound concrete and can be fixed on top of it. Damage that came from below is different. If the base has eroded, if the slab has broken into pieces at different heights, if cracks pass all the way through and keep opening season to season, then the concrete is reacting to ground movement and nothing applied to the surface will stop it.
Age matters too. A twelve-year-old driveway with one bad section is worth repairing. A sixty-five-year-old one where the whole surface is rough and the edges are gone is at the end of its service life, and the honest advice is to put the repair money toward pouring a new driveway instead of spending it twice.
Why does concrete in this town deteriorate the way it does?
Almost every repair we get called to traces back to water. Water gets into the surface and into cracks, it freezes, it expands, and it takes a little concrete with it every time. On a lake-plain lot where the soil holds moisture and the temperature crosses freezing over and over from December into April, that cycle runs far more often than most people realize.
Road salt multiplies it. Salt carried up from Titus, Culver and every plowed side street melts ice that would otherwise stay solid, so the slab goes through more freeze-thaw cycles per winter than the weather alone would give it. On concrete poured before air entrainment became standard, which is most of the original flatwork on these houses, there is no internal room for that expanding water, so the surface pops off in flakes.
Underneath, settlement comes from washed-out fines. A downspout emptying beside a slab, a leaking sill cock, or a poorly graded yard moves soil out from under the concrete a little at a time until there is a void. Then the slab cracks under its own weight or the first heavy vehicle. Tree roots do the opposite, lifting sections from below. Fixing the concrete without fixing the water is why some repairs fail twice.
What affects the cost of a concrete repair?
Method drives it more than area. Sealing cracks is inexpensive and fast. Slab lifting is priced by how much material it takes to fill the void, which nobody knows precisely until the pump is running, so we give you a range and a cap. Resurfacing is priced by square footage and by how much preparation the old surface needs, which is most of the labor. Grinding a trip hazard is usually an hour's work. Access, the amount of tear-out, and whether we also need to correct drainage all move the number. Where a repair and a replacement are close in price, we will say so rather than quietly selling you the repair.
Repair or replace: how we decide with you
We look at three things. The first is how much of the surface is affected, since anything under about a third usually favors repair. The second is whether the concrete is still moving, which you can often see at the joints. The third is how old it is, because a repair on concrete near the end of its life buys a shorter reprieve than the same repair on a younger slab. If the answer is replacement, we say it and show you why, whether that means a new driveway, a new patio slab or a rebuilt entrance.
Repair questions we get
Can you match the color of my existing concrete?
Close, rarely exact. Concrete cures to its final color over months and then weathers for years, so a patch poured today will always be a slightly different shade. It blends considerably in the first season. Where appearance really matters, replacing a full panel between control joints looks far better than a patch in the middle of one.
How long does a repair last?
A crack seal on a stable slab lasts several years and is easy to renew. A lifted slab stays put as long as whatever washed the soil out has been dealt with: fix the downspout and it holds; don't and it sinks again. A bonded resurface on sound concrete typically gives eight to fifteen years. We tell you which of those you are buying before you agree to it.
Will sealing my driveway stop it from breaking down?
Sealing sound concrete is genuinely useful and worth doing every few years. Sealing concrete that has already scaled is not: it locks moisture into a surface that is failing and hides the problem for a season. If sweeping brings up sand and exposed stone, sealer is the wrong purchase.
Do you do small jobs?
Yes. One trip hazard, one cracked step, one sunken walkway panel. Small repairs are how most people find out whether a contractor is worth calling for the big job, and we would rather earn that than turn it down.
Find out whether it can be saved
Send a photo or have us come out. You'll get a straight answer on repair versus replacement and a written price for whichever one makes sense.