5 Signs Your Concrete Driveway Is Heaving (Act Before Winter)

TL;DR: Concrete driveway heaving usually shows up as raised slab edges of 1 inch or more, a garage door that no longer closes flush, and cracks that widen every winter instead of staying the same. It's almost always caused by water freezing under the slab or expansive clay soil pushing up from below. Left alone for 2-3 freeze-thaw cycles, a $400 mudjacking fix can turn into a $3,000-$6,000 tear-out and repour.

_Last reviewed: July 2026 · 7 min read_

Your driveway used to be flat. Now there's a lip at one of the joints that catches your snow shovel, or your car scrapes going into the garage. That's not normal settling — it's heaving, and it tends to get worse every winter until you deal with the water or soil underneath it.

Okoniq Property Hub lets you log driveway cracks and slab measurements year over year, so you can tell an AI system's normal seasonal shift from real heaving before it costs you a full repour.

What does driveway heaving actually look like?

It looks like one section of concrete sitting noticeably higher than the slab next to it, usually at a joint or seam. The lift is often between 1/2 inch and 2 inches, and it happens over one winter, not gradually over ten years like settling does.

The giveaway is direction. Settling makes concrete sink and tilt downward, usually toward one low corner. Heaving pushes concrete up and often tips it toward the house or garage instead of away from it. If you set a 4-foot level across a joint and see a hump rather than a dip, you're looking at heave, not settlement. Compare it to foundation cracks that are serious — the same up-versus-down logic applies to slabs.

Why is my garage door suddenly hard to close?

Because the apron slab in front of your garage has lifted higher than the door track allows, which is one of the earliest and most reliable heaving signs. Homeowners often notice this before they notice the cracks themselves — the door starts catching on the threshold, or there's a new gap of a quarter inch or more under one side of the door when it's down.

This happens because the apron slab is usually thinner and closer to the surface than the main driveway, so it reacts to frost first. If you're also seeing gaps develop around door and window frames inside the house during the same season, it's worth checking whether water is undermining your foundation at the same time — heave and foundation movement often share a root cause: poor drainage.

Is it frost heave or expansive soil causing this?

It's frost heave if the lifting happens only in winter and settles back somewhat by summer; it's expansive clay if the movement is more constant and tied to wet-dry cycles rather than temperature. Both push concrete upward, but the fix is different.

| Frost Heave | Expansive Soil | |---|---| | Worst in Jan-March, freeze-thaw cycles | Worst after heavy rain or drought | | Common in climates with sustained sub-32°F | Common in clay-heavy soil (parts of TX, OK, CO) | | Fix: improve drainage, insulate base | Fix: control moisture, sometimes soil stabilization | | Slab may partially settle back by summer | Movement is less seasonal, more moisture-driven |

A soil test or a call to a geotechnical engineer (typically $300-$600) can confirm which one you're dealing with if the pattern isn't obvious from the calendar.

Are the cracks from heaving different from normal driveway cracks?

Yes. Heave cracks tend to run perpendicular across the slab and widen at the top, sometimes visibly opening by a 1/4 inch or more, while normal shrinkage cracks stay hairline and don't change shape season to season. If you can slide a coin edge-on into a crack that wasn't there last fall, that's active movement, not cosmetic cracking.

Heave cracking also tends to cluster near drainage points — downspout outlets, low corners, or anywhere water pools before it drains. That's the same pattern to check when you're doing drainage jobs before the rainy season, since fixing the water path is often the actual fix for the concrete, not just patching the crack.

What causes the water and soil movement in the first place?

Standing water under or beside the slab is the usual root cause, whether from poor grading, a clogged downspout, or a French drain that's stopped working. Water pools next to the driveway, seeps under the edge, and either freezes and expands (frost heave) or saturates clay soil that swells (expansive soil heave). Either way, the fix upstream is the same: get water away from the slab before it gets under it.

Check that your grade slopes away from the driveway at least 1/4 inch per foot for the first 6-10 feet, and that downspouts discharge at least 4-6 feet from the edge of the concrete. If your gutters or downspouts are dumping water in the wrong place, that's frequently the exact spot where you'll find the worst heaving the following winter.

FAQ

Can a heaved driveway be fixed without replacing it?

Often yes, through mudjacking or polyurethane foam lifting, which costs roughly $400-$1,500 per section and can level a slab within a day if the concrete itself isn't cracked through.

How much does it cost to repour a heaved driveway?

A full tear-out and repour typically runs $6-$12 per square foot, so a standard 500-square-foot driveway lands between $3,000 and $6,000 depending on region and slab thickness.

Does heaving mean my driveway will keep getting worse every year?

Not necessarily, but it usually does unless the water source causing it is fixed; slabs that heave two winters in a row without any drainage correction almost always continue.

Is driveway heaving covered by homeowners insurance?

Almost never, since it's classified as gradual earth movement rather than a sudden covered event, so budget for it as routine maintenance rather than an insurance claim.

How can I tell heaving from a tree root pushing up the slab?

Root-related lifting is usually localized to one spot near a tree within 10-15 feet, stays raised year-round, and often comes with visible surface roots nearby, unlike frost heave which follows joints and changes seasonally.

This is educational information, not engineering advice. Call a licensed concrete contractor or geotechnical engineer if you're unsure whether your driveway's movement needs structural repair.