A driveway that has dropped an inch or two almost never settles back on its own. The decision to repair or replace an uneven driveway usually comes down to two factors we look at first: the size of the slab and its age. Expansive clay soil, drought seasons, and four full seasons of freeze and thaw move concrete more than most property owners expect. Our job is to tell you whether the slab is still worth saving.
What Makes a Driveway Shift in the First Place
Expansive Clay Soil and Dry Seasons
We see the most movement during dry, drought-like stretches. Clay soil shrinks as it loses moisture, and the slab loses the support underneath it. Sidewalks, patios, and driveways all shift when that happens, and the lay of the land decides which direction they drop.
The Age and Size of the Slab
Older concrete has already absorbed years of soil movement. A newer slab that has dropped once is often a straightforward lift. A slab that has been cracking for decades is a different conversation.
Key Takeaway: Settling is a soil problem before it is a concrete problem. Fixing the surface without addressing the void underneath only buys you time.
How We Decide Whether to Repair or Replace an Uneven Driveway
When Polyurethane Jacking is the Right Call
Polyjacking exists to salvage concrete that is still structurally sound. We regularly lift slabs anywhere from a half inch up to five and a half or six inches at any given point. On sidewalks, we typically work in the four- to five-inch range.
We can push a lift to nine or ten inches when a customer wants it, though that means shooting a large volume of material down through the concrete. In most cases, we prefer to stay within that six-inch window.
Signs Replacement Makes More Sense
When we walk a job and find the slab is past the point where polyjacking helps, we say so. Watch for these conditions:
- Concrete that is buckled and busted up
- Spiderweb cracking across multiple sections
- Cracks wide or raised enough that you trip over them
- Sections that have crumbled rather than settled as a unit
Bolded tip: If the slab has broken into pieces, there is nothing solid left to lift. That is when replacement becomes the better investment.
Need expert help deciding between concrete lifting and full replacement? Contact Olson Foundation Repair for a free consultation and an honest assessment of your slab.
What to Expect When We Inspect Your Driveway
Our On-Site Evaluation
We measure the drop, check the condition of the concrete, and look at how the surrounding ground drains. From there, we recommend the option that fits the slab in front of us, not the one that sells the most material.
Repair or Replace an Uneven Driveway Without Guesswork
You get a clear explanation of what we found, what we recommend, and why. If polyjacking will hold, we lift it. If the concrete is finished, we tell you that instead of patching a problem you will call us about again next year.
Pro Tip: Take a photo of the low section now and another after the next heavy rain. Ongoing movement between the two is worth reporting during your inspection.
Schedule Your Free Driveway Assessment
Our crews have spent years lifting settled concrete across this region, and we bring that same judgment to every slab we walk. Call Olson Foundation Repair or request a quote online, and we will help you decide whether to repair or replace an uneven driveway.
