A pothole looks like the emergency and often isn't. Alligator cracking, the cracked pattern that spreads across a section of driveway or lot like reptile skin, looks less dramatic and is usually the more serious problem: it means the base underneath has failed, and no amount of surface patching fixes something that's happening below the surface.
Water gets in first, almost always. A small crack lets water down through the asphalt surface, and once it reaches the base underneath, it softens the material that's supposed to be supporting the pavement above it. Traffic driving over that softened spot pushes the surface down and eventually breaks it, and what started as a hairline crack becomes a hole you can feel through the steering wheel. It happens faster under repeated heavy loads, a driveway spot where a trash can sits every week, or a lot entrance where every vehicle brakes hard in the same few feet, but water finding its way in is almost always step one.
It means the base has failed, not just the surface. Alligator cracking gets its name from the pattern, tight, interconnected cracks in polygon shapes that resemble reptile skin, and it's caused by asphalt flexing under repeated traffic loads it no longer has enough support to handle. A few isolated cracks are usually just surface weathering, the normal aging that comes with sun and time. A spreading, interconnected web of cracks across a section of pavement is a structural signal, and it means whatever's underneath, the base rock, the compaction, or both, isn't doing its job anymore. Patching the surface over active alligator cracking without addressing the base is a short-term fix on a structural problem, and it tends to fail again within a season or two.
Different cracking patterns point to different causes, and matching the fix to the actual cause is what separates a repair that holds from one that doesn't.
| What You See | Likely Cause | Typical Fix |
|---|---|---|
| Fine, scattered surface cracks | UV and weather aging (oxidation) | Crack sealing, sealcoating |
| Single straight or diagonal crack | Minor settling or thermal movement | Crack fill or a small patch |
| Alligator cracking (interconnected pattern) | Base failure under repeated loading | Full-depth patch or reconstruction |
| Pothole | Water intrusion plus advanced base failure | Remove and patch down to stable material |
| Rutting (grooves in wheel paths) | Base too soft or asphalt too thin for the load | Often needs reconstruction, not a patch |
None of this replaces an actual site visit. A crack that looks minor from a distance can be sitting right on top of a soft spot in the base, and the only way to know for sure is to look closely or, in some cases, cut a small test section.
Correctly, which is not the same as quickly. A real patch starts with saw-cutting a clean, usually rectangular, edge around the damaged area rather than just filling the hole itself, because a ragged edge fails again faster than a clean one bonds. The damaged asphalt and any compromised base underneath get removed, not just the top layer. New base material goes in and gets compacted if the old base failed, then new asphalt gets placed and compacted to match the surrounding grade. Compare that to a cold-patch fix, cold mix asphalt pressed into a pothole without removing the surrounding damage or fixing the base underneath, which is a reasonable temporary measure but rarely holds through a full season, especially under regular vehicle traffic.
Got a spot that keeps coming back no matter how many times it's been patched? Call (619) 732-0070. It's usually a sign the base needs attention, not another quick patch.
When the damage is spread out instead of contained. One pothole, or a single section of alligator cracking in a driveway that's otherwise solid, is a good patching candidate. Cracking or potholes showing up in multiple spots across the same surface, or a patch that's already failed once in the same location, usually means the whole section's base is compromised, not just the part that's visibly broken. At that point, patching piece by piece often costs more over a year or two than a proper repave would have cost from the start.
Usually, yes, and it's common practice. HOA and commercial lots rarely fail evenly across the whole surface. Drive aisles and entrances that see the most turning and braking wear out faster than parking stalls that mostly just hold a stationary car, so it's normal to patch or reconstruct the worst sections, entrances, aisles, trash enclosure approaches, while leaving sound pavement alone. A property manager doesn't have to choose between ignoring a problem and repaving an entire lot. Most repair scopes get built around exactly where the damage actually is.
Both. Constant UV exposure oxidizes the asphalt binder and makes the surface more brittle over time, which means small cracks form more easily than they would in a shadier or wetter climate. But sun damage alone tends to produce fine, scattered surface cracking, not alligator cracking. When alligator cracking shows up here, it's still almost always a base problem, water, poor compaction, or a section that was never built to handle the traffic it's getting. The sun just means the surface cracks that expose that base problem tend to show up a little sooner.
Not much, beyond keeping an eye on it and avoiding driving directly through it if you can help it, since repeated traffic through a pothole makes it grow faster. Marking it with a cone or a bucket is reasonable if it's in a spot other people use, especially on an HOA lot where a resident's tire could catch it in the dark. Filling it yourself with gravel or leftover concrete usually causes more work later, since that material has to be removed before a proper patch can go in.
Mostly scale. Patch usually refers to fixing a specific, contained spot: a pothole, a small alligatored section, a spot where a tree root has heaved the surface. Repair gets used more loosely and can mean anything from a single patch to multiple patches across a lot in the same visit. Neither term implies anything about the base being addressed unless it's explicitly part of the scope, so it's worth asking directly whether a quote includes fixing what's underneath a damaged spot or just resurfacing over it.
Many contractors back their patch work for a defined period, often a year or more, against failure at the same spot, though the fine print varies by company. A warranty on a patch typically covers workmanship, not new damage. A fresh tree root or a plumbing leak that shows up six months later isn't the same failure as the original repair. Ask what's actually covered before assuming a patch is guaranteed forever, and get it in writing rather than a verbal promise.
Yes. Most patch jobs are contained to the damaged area and don't require closing off the rest of a driveway or lot, though the immediate patch area needs to stay clear of traffic while it cures.
Hot-mix patches typically need a few hours to cool and firm up before light traffic, and it's best to avoid parking directly on a brand-new patch for a day or two if possible.
It works as a genuine temporary fix, especially for a pothole that needs to be safe to drive over right away, but it's not built to hold up the way a properly saw-cut hot-mix patch is, and it usually needs replacing within a season.
Usually because the base underneath wasn't addressed the first time, only the surface. A patch that only covers the visible hole without fixing whatever caused it, water intrusion, poor compaction, tree roots, tends to fail again in the same place.
There's no fixed number, but if you're patching the same driveway or lot every year, or patching more than a handful of separate spots at once, the math usually favors a repave over continuing to patch piece by piece.
Call (619) 732-0070 for a free assessment of what's actually causing the damage, patch, repair, or something bigger.