Could Tree Roots Be Cracking or Lifting My Concrete?

You’re not imagining it: tree roots can crack or lift concrete, especially near mature trees and thin slabs. But most of the time, roots don’t smash through “good” concrete like a jack. They take advantage of cracks and weak or uneven support that’s already there (as noted in UF/IFAS guidance on roots lifting concrete).

This guide helps you identify what you’re seeing. Use it to sanity-check the situation before you start playing whack-a-mole with repairs. You’ll learn how to tell cracking from lifting, how to spot when roots are a likely contributor (and when drainage or base issues may be the bigger driver), and when it makes sense to call an ISA-certified arborist versus a concrete leveling or replacement pro so you don’t trade today’s trip hazard for tomorrow’s settling or a destabilized tree.

Cracking vs Lifting: What You’re Seeing

You can live with an ugly crack for years, but a lifted lip can turn into an uneven concrete trip hazard or a gate that won’t close right when you’re in a hurry. Getting the label wrong is how a small issue turns into the wrong repair.

Cracks are lines in the concrete surface. They can look ugly and still be mostly a “concrete does that” issue, especially on older 4-inch sidewalks and patios. Lifting (also called heaving or vertical displacement) is different: one side of a joint or crack sits higher than the other, creating a lip you can catch a toe on or a spot where a gate suddenly starts scraping—often what people mean by tree roots lifting concrete.

Before you blame the closest tree, classify what you have with a quick check.

Roof inspections are most valuable when you catch small issues before they turn into bigger, more expensive repairs. Read more in our article: Roof Inspection Worth It Treat it like a home inspection report, not a gut call. If the surfaces stay level, you’re dealing with cracking. If you can measure a vertical offset, treat it as a movement/support problem that needs triage for safety, not just a cosmetic patch.

Could Tree Roots Be Cracking or Lifting My Concrete? A Quick Risk Screen

A nearby tree doesn’t automatically mean the tree caused your crack or that there are tree roots under concrete. Roots rarely “break” sound, well-supported concrete. They slip into gaps like water in sandy soil, so get ahead of it by hunting the weak spot.

What to Do Next if Roots Are Involved (and if They Aren’t)

A homeowner spots a lifted panel, chops a “problem root,” and the next big rain leaves a worse void and a still-wobbly slab. The safer win is choosing the first call and the first fix based on what’s actually moving.

Start by checking what the slab is doing: probe along the lifted edge for a void (you can sometimes slide a screwdriver under) and look for soil washout paths from downspouts or runoff. Note whether the concrete is already cracked into multiple pieces. That evidence tells you whether you’re dealing with a support problem you can stabilize, or a section that needs replacement.

In coastal North Carolina, water intrusion and washout can cause movement problems that get mistaken for other causes until the damage spreads. Read more in our article: Early Roof Leak Signs

If roots look involved and you’re considering cutting anything, call an ISA-certified arborist first, especially in coastal North Carolina where driveway lifting near tree issues can turn a destabilized tree into a liability problem fast. If the main issue is a trip edge or sunken/lifted panel, call a concrete leveling or replacement pro. Do not DIY this based on a Nextdoor thread. Don’t bet on a “simple” root barrier or one root cut after the fact: barriers are mainly preventive, and cutting an established root can trade today’s heave for tomorrow’s settling unless you also address the void and base support.