Single straight crack getting wider
One main crack is opening up, but the surrounding driveway still looks mostly solid.
Start here: Check width, depth, and whether both sides are still flush before deciding on filler or patch material.
Driveway crack troubleshooting
Driveway Cracks Getting Worse
Direct answer: If driveway cracks are getting worse, the usual reason is movement under or around the slab or asphalt, not just an old surface split. Start by checking whether the crack is only opening, whether one side is higher, and whether water is running across or under that area.
Most likely: The most common causes are water washing out support, freeze-thaw movement, weak edges, or a crack that was sealed late or not at all.
Look at the crack pattern before you buy anything. A single narrow crack is a different job than a sunken section, a crumbling edge, or a web of alligator-style cracking. Reality check: small cracks rarely stay small where water sits. Common wrong move: sealing over dirt, weeds, and loose material and calling it fixed.
Don’t start with: Don’t start by coating the whole driveway or stuffing every crack with filler. If the base is moving, the crack will come back and the patch can fail fast.
If the crack is narrow and both sides are still level,clean it out and plan for a crack repair, not a full rebuild.
If one side has dropped, the surface pumps water, or the area is breaking into chunks,treat it as a support problem first and expect a larger repair or pro evaluation.
Last reviewed: 2026-04-04
What the worsening cracks look like
Crack with one side higher or lower
You can feel a lip with your shoe or see one side of the driveway has settled.
Start here: Look for drainage, washout, or soil movement nearby. Height difference matters more than crack length here.
Edge cracks and corner breakup
The driveway edge is splitting, crumbling, or breaking off near the lawn or apron.
Start here: Inspect whether the edge has lost support from erosion, tire loading, or a thin unsupported section.
Spiderweb or alligator-style cracking
Instead of one crack, the surface is breaking into many small connected pieces.
Start here: This usually points to broader failure, not a simple crack fill. Check whether the surface is soft, loose, or pumping under load.
Most likely causes
1. Water is getting under the driveway and washing out support
Cracks that widen after rain, near downspouts, low spots, or runoff paths usually mean the base is moving.
Quick check: Run water from a hose uphill of the crack or watch the area during rain. Look for pooling, muddy seepage, or water disappearing under the slab or asphalt edge.
2. Freeze-thaw movement is opening an existing crack
A crack that looked minor before winter but opens wider or spalls at the edges after cold weather often follows trapped moisture.
Quick check: Look for fresh chipping, popped edges, or new small side cracks branching off the original split.
3. The driveway edge or section is overloaded and unsupported
Cracks near the edge, where vehicles cut the corner or park repeatedly, often start because the edge has little support underneath.
Quick check: Probe the soil beside the edge and look for a hollow gap, erosion, or a broken corner where the driveway meets softer ground.
4. The surface is past simple crack repair
If you see many connected cracks, loose pieces, or soft spots, the problem is no longer just one crack.
Quick check: Tap and press around the area. If pieces move, sound hollow, or crumble under light pressure, a filler-only repair will not last.
Step-by-step fix
Step 1: Sort out the crack pattern before touching it
You need to know whether this is a simple opening crack, settlement, edge failure, or broader breakup. That choice decides whether patching makes sense at all.
- Walk the full driveway and mark every visible crack with chalk so you can see the pattern, not just the worst spot.
- Measure the widest part of the main crack and note whether it is hairline, roughly pencil-width, or wider.
- Check for height difference by laying a straight board or level across the crack.
- Look for branching cracks, loose chunks, crumbling edges, or a webbed pattern spreading out from the area.
Next move: If you find one or two isolated cracks with little or no height difference and solid surrounding material, a localized repair is still realistic. If the area has many connected cracks, loose pieces, or obvious sinking, skip cosmetic fixes and plan for a larger repair path.
What to conclude: Simple isolated cracks can often be cleaned and filled. Movement, breakup, and widespread cracking point to support failure or a worn-out section.
Stop if:
- One side of the driveway has dropped enough to create a trip edge.
- A vehicle-sized section rocks, sounds hollow, or breaks apart under light pressure.
- You find a broad alligator pattern instead of one repairable crack.
Step 2: Check where the water is going
Worsening driveway cracks usually track back to water. If runoff is feeding the crack, any patch is temporary until that is corrected.
- Inspect nearby downspouts, buried drain outlets, and low spots that send water toward the cracked area.
- Look along the driveway edge for washed-out soil, voids, or places where water has cut a channel underneath.
- After rain, note whether water ponds on the crack, runs into it, or exits from the side of the driveway.
- If conditions are dry, use a hose briefly uphill of the crack and watch whether water disappears into the joint or shows up at the edge.
Next move: If you find runoff feeding the crack or soil washing out at the edge, fix the drainage issue first or at the same time as the surface repair. If the area stays dry and stable with no sign of washout, the crack is more likely from age, shrinkage, freeze-thaw, or loading.
What to conclude: Water entering or traveling under the driveway is a strong reason cracks keep reopening and sections start to settle.
Step 3: Decide whether the driveway is still solid enough for a crack repair
A crack filler works only when the surrounding driveway still has enough strength to hold together.
- Use a screwdriver or similar blunt tool to scrape the crack edges and remove loose material.
- Press on nearby pieces with your foot. Check whether the surface flexes, crumbles, or sheds aggregate easily.
- For concrete, look for spalled edges and hollow-sounding sections around the crack. For asphalt, look for soft spots, raveling, or loose stone.
- Check the driveway edge and corners separately. Edge failure often spreads even when the center still looks decent.
Next move: If the material around the crack is firm and the edges clean up to solid material, a crack repair or small patch has a fair chance of holding. If the area is soft, hollow, crumbling, or breaking into pieces, stop treating it like a simple crack and move toward section repair or replacement.
Step 4: Repair only the cracks that match a simple fill or patch job
Once you know the area is stable enough, the right repair is mostly about crack size and surface condition.
- Clean out dirt, weeds, and loose material completely with a broom and hand tools so the repair bonds to solid driveway material.
- For a narrow to moderate isolated crack in otherwise sound asphalt or concrete, use a driveway crack filler made for that surface and crack size.
- For a wider damaged spot with missing edges but solid support underneath, use a driveway patch material instead of trying to bridge the gap with filler alone.
- Do not overfill proud of the surface where tires will catch it, and do not patch over standing water or damp muddy edges.
Next move: If the repair bonds to clean, solid material and the crack area stays level and dry, you have likely addressed the right level of damage. If the filler sinks, splits back open quickly, or the patch edges break loose, the driveway is still moving or the surrounding material is too far gone.
Step 5: Act on the bigger failure signs instead of chasing the crack
Some worsening cracks are really telling you the driveway section has lost support or reached the end of its service life.
- If one side is settled, the edge is washed out, or the crack keeps reopening, correct the drainage path and get the support issue evaluated before spending more on fillers.
- If the damage is concentrated at the street end, compare it to apron movement and treat that area separately from the rest of the driveway.
- If you have alligator cracking, soft spots, or repeated patch failure, plan for section replacement rather than another surface-only repair.
- Mark the crack ends and recheck them after a few weeks of normal weather. If they continue to spread, move ahead with a permanent repair plan instead of waiting another season.
A good result: If drainage is corrected and the damaged area stays stable, you can limit repairs to the affected section instead of losing more of the driveway.
If not: If movement continues after runoff is redirected, the driveway likely needs slab lifting, base repair, or section replacement by a pro.
What to conclude: The right next move is often stopping the cause, not adding more patch. That is especially true with settlement, edge loss, and alligator cracking.
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FAQ
Can I just seal a driveway crack that keeps getting bigger?
Only if the surrounding driveway is still solid and level. If the crack is widening because the base is washing out or one side is settling, sealer alone will not hold for long.
How do I know if a driveway crack is structural or just cosmetic?
Look for height difference, spreading branches, loose pieces, soft spots, or repeated reopening after patching. A simple surface crack usually stays narrow and the material around it still feels firm.
Why do driveway cracks get worse after winter?
Water gets into small openings, freezes, expands, and breaks the edges apart. Once the crack edges chip and open up, more water gets in and the cycle speeds up.
Should I use crack filler or patch material?
Use crack filler for an isolated crack in sound driveway material. Use patch material when the crack has widened into a damaged spot with missing edges or a shallow broken-out area, as long as the base is still solid.
When is it time to replace part of the driveway instead of patching it?
When you have alligator cracking, soft spots, hollow sections, major edge loss, or one side settling, the driveway has moved beyond a simple crack repair. At that point, section repair or replacement is usually the durable fix.