Direct answer: A heaving driveway usually means something under the surface is pushing up. Most often that is frost in a wet base, trapped water with poor drainage, or tree roots lifting one section. Start by figuring out whether the lift changes with the season, follows a root line, or comes with cracking and loose base material.
Most likely: The most common cause is water getting under the driveway, then freezing or softening the base until one slab or section rises higher than the rest.
Look at the shape of the lift before you do anything else. A single slab edge kicked up after winter points one way. A long ridge near a mature tree points another. Reality check: once a driveway has truly heaved, surface patching alone rarely fixes it for long. Common wrong move: sealing the top while runoff and downspout water are still feeding the base from the side.
Don’t start with: Do not start by smearing crack filler over the hump or grinding the high spot flat. That hides the symptom and leaves the pressure underneath.
One area lifts during cold weather, often near the edge or over a wet spot, then drops some when temperatures stay above freezing.
Start here: Start with drainage and moisture under the driveway. Seasonal movement strongly points to frost heave.
The driveway rises in a line or broad hump that tracks toward a mature tree, and the lift does not depend much on season.
Start here: Check for root pressure first, especially if nearby soil is also raised.
A concrete slab edge or corner sits proud of the next section, often with a crack, open joint, or washed-out soil nearby.
Start here: Look for base washout, poor drainage, or settlement around the lifted section rather than a surface-only problem.
The asphalt crowns upward, splits, or feels unstable around the hump, sometimes with low spots that hold water nearby.
Start here: Check whether the base is staying wet or pumping up through the asphalt. If the surface is also soft, compare it with asphalt driveway soft spots.
This is the most common pattern when the problem appears after winter, especially where runoff, downspouts, or low grading keep the base wet.
Quick check: Look for standing water, soggy edges, clogged drainage paths, or a downspout discharging toward the driveway.
A slow-growing hump near a mature tree usually follows the root path and keeps getting worse even without freezing weather.
Quick check: Check for a raised strip running from the tree toward the driveway and roots visible at the edge or in nearby soil.
If the driveway was built over poorly compacted fill or the base has washed out, one section can tilt, crack, and ride higher than the next.
Quick check: Look for voids at slab edges, loose aggregate, erosion at the sides, or movement when you step near the joint.
Alligator cracking, raveling, or soft asphalt can mimic a raised area when the real issue is surface breakdown or a weak base, not upward pressure alone.
Quick check: If the area is crumbling, shedding aggregate, or feels soft underfoot, compare that pattern with asphalt raveling or driveway alligator cracking.
You need to know whether the driveway is moving from freeze-thaw, being pushed by roots, or failing in place. The shape and timing tell you more than the crack itself.
Next move: If the pattern is clearly seasonal or clearly tied to a tree line, you have a strong starting point and can avoid the wrong repair. If the pattern is hard to read because the whole area is cracked, soft, or broken up, treat the driveway as a larger structural problem instead of a simple hump.
What to conclude: Seasonal movement usually points to moisture and frost. A steady ridge near a tree points to roots. Widespread breakup points to a failing surface or base.
Bad drainage is the most common reason a driveway base stays wet enough to heave. If you skip this, even a decent patch can fail again.
Next move: If you find water feeding the area, correct that first and then monitor whether the lift settles or stops getting worse. If the area stays dry and the hump still looks active, roots or a failed base move higher on the list.
What to conclude: A wet base under concrete or asphalt is the usual setup for frost heave and for base movement after storms.
Root heave and frost heave can look similar from the top, but the repair path is different. Cutting or patching blindly can make things worse.
Next move: If the hump clearly tracks a root path, plan around root management and likely section replacement rather than surface patching. If there is no tree influence and the area is wet or seasonally active, go back to drainage and base conditions as the main cause.
Some heaves leave minor cracks you can seal after the movement stops. Others need the raised section removed and the base corrected. This is where you avoid wasting material.
Next move: If the damage is minor and stable, a driveway patch can buy time and reduce water entry. If the section is unstable or still rising, skip patch-only repairs and get estimates for lifting, resetting, or replacing that section with base correction.
A heaving driveway is usually a symptom, not the whole repair. Finish with the fix that matches the cause instead of the one that is easiest to buy.
A good result: You fix the source first, then repair only what the driveway can actually hold.
If not: If the cause is still unclear after these checks, a contractor should inspect the base and drainage before any material goes down.
What to conclude: The right repair depends on whether the pressure is seasonal moisture, roots, or a failed base. Surface products only help when the movement has stopped and the structure is still sound.
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Only if the movement has stopped and the damage is minor. If water, frost, roots, or a failed base are still pushing from below, the patch usually cracks back out.
Frost heave usually shows up after freeze-thaw weather and may settle some later. Root heave usually forms a longer ridge near a tree and keeps progressing regardless of season.
The cause can be the same, but the surface shows it differently. Concrete often kicks one slab edge up or cracks through a joint. Asphalt more often forms a hump, split, or soft broken area if the base is wet and weak.
No. Sealing helps keep more water out, but it does not remove trapped water, fix a bad base, or stop root pressure that is already lifting the driveway.
Call when the lift is large, the slab or asphalt is unstable, there is visible washout underneath, or tree roots are involved. Those cases usually need base correction, section replacement, or a coordinated plan with an arborist.