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Yes, you can mudjack cracked concrete, but the cracks will need to be repaired once the concrete has been leveled. If the concrete is severely cracked in multiple places, replacement may be a better option, but for less severe cracking, mudjacking is a good solution as long as cracks are correctly caulked and sealed.

There’s no legal requirement that states that you need rebar in a concrete driveway, but since the slab will be supporting heavy vehicle loads, it’s always a good idea to pay a bit more for rebar reinforcement. Your driveway will be much more likely to crack if you don’t reinforce it with rebar. Driveways that need to support commercial vehicles or provide parking for multiple vehicles at once should always include rebar reinforcement. If you’re pouring concrete over asphalt or pouring concrete over an existing slab, you may not have enough depth for rebar, meaning an increased risk of cracking.

A layer of exposed aggregate concrete should be 1 to 2 inches thick if you’re installing it on top of existing concrete. If you’re pouring a new slab with the finish, slab thickness will depend on the application. Exposed aggregate concrete driveways should be 4 to 6 inches thick in most cases or 8 to 12 inches for commercial vehicles. Sidewalks, patios, and walkways should be 4 inches thick.

Concrete blemishes such as chipped steps or small cracks are fixable with patching. For bigger jobs, including driveway repair and cracks wider than a 1/4 of an inch, patches will only serve as a temporary fix. Resurfacing is ideal when the surface is showing more widespread wear—like if it’s pitted, rough, or has lots of cracks. Resurfacing gives your concrete a fresh, like-new appearance without needing a full replacement.

When the concrete is severely cracked, sinking, or otherwise structurally unsound, replacing it might be your best option. Replacement ensures the safety and longevity of the surface in this case.