We read the symptom, match the method to how deep the damage goes, and tell you when patching stops paying.
You can learn most of what you need to know about a slab from the curb. Stand at the street and look at the driveway edge first, then the walk, then the porch landing. Crumbling shoulders along a joint say water has been getting in and freezing there. A chalky bloom says the top layer is giving up. A shadow line across a panel says one side dropped and the other didn't. No tape measure required.
That's how we open a repair visit here. Look from a distance, get close, then tap the surface with a hammer and listen for the hollow spots where concrete has quietly let go of itself. Aurora covers a lot of ground and the dirt changes from one subdivision to the next, so two houses showing the same symptom can need two different repairs. We'd rather say that out loud than pretend a photo settles it.
Flaking first. When the top of a slab comes off in thin sheets or loose grit, that's scaling, and it usually traces to one of two things: water worked into the surface during finishing, or chloride deicer thrown on concrete that wasn't ready for it. The slab underneath can be perfectly sound. The skin is what failed.
Crazing looks alarming and rarely is. Fine lines in a pattern like dried mud sit in the very top of the paste, left behind by a surface that dried faster than the concrete below it. Dry air at 5,471 feet and a sun that doesn't quit make crazing more common here than most people expect.
Then the two that matter. A wide crack with both sides sitting level is shrinkage that went somewhere nobody told it to go, and sealant handles it. A crack with one side riding low is a support problem, and there is no sealant for support. Spalled corners at a joint fall in between: the edge has been taking freeze pressure with nowhere to expand, and it will keep crumbling outward until somebody stops it.
| What the damage reaches | The method we use | What it buys you |
|---|---|---|
| Tight line, both sides flush | Route it to a clean square groove and seal | Years, provided water stops standing in it |
| Top quarter inch scaled or dusting | Grind the surface and bond an overlay on top | A decade or better if the sealer stays current |
| Broken shoulder at a joint or corner | Saw the perimeter, chip to solid material, patch partial depth | Long life, because the patch keys into sound concrete |
| Crack with one side sitting low | Lift the panel first, seal the crack second | Holds until whatever moved the soil comes back |
| Section broken into loose pieces | Cut it out and repour that panel | Full service life. Patching here is money burned. |
| Gaps that widen every spring | Grading and drainage work before any concrete | Nothing bonded to a moving slab stays bonded |
Aurora built out in waves and the repair work follows those waves. Around Sterling Hills, Tollgate Crossing, and Murphy Creek we're looking at flatwork that has been through enough winters to reveal exactly what kind of base prep it got. Slabs poured over a skim of gravel are the ones with settled panels and joints yawning open. Slabs poured over real compacted base are still tight, and keeping those going another twenty years is cheap work.
Southshore, Saddle Rock, and Tallyn's Reach hand us younger problems. Cracks in concrete that isn't old enough to have earned them, usually because a joint got sawed a day late or the grade behind the house sends runoff straight back at the slab. Those repairs go fast. The conversation about where the roof water lands takes longer than the concrete work does.
Send one photo from standing height and one from a foot away. We'll tell you which category it falls in, free.
People are surprised how much a hammer tells us. A patch that looks fine will ring hollow across two feet, which means it never bonded and it's coming off next spring. Ten minutes of tapping keeps somebody from paying twice for the same square foot.The crew lead's read on it
Still unsure about something?
Call the crew at (303) 569-4046 and we will talk it through.
Get a free, no-obligation estimate from a crew that knows Colorado soil, Colorado weather, and how to finish concrete that lasts.
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