Concrete is one of the toughest materials around a home, but it isn’t indestructible. Over time, driveways, patios, sidewalks, and garage floors can crack, settle, or sink as the soil beneath them shifts. Uneven slabs aren’t just unsightly; they can create tripping hazards, direct water toward your foundation, and lower your home’s curb appeal. The good news is that homeowners have several options, from simple repairs to full replacement, depending on the condition and age of the concrete.
Know How Long Your Concrete Should Last
Before deciding how to fix damaged concrete, it helps to understand how long it’s expected to hold up. According to SlabCalc, residential concrete surfaces such as driveways and patios typically last 25 to 30 years when they’re installed correctly and properly maintained.
Several factors affect where your concrete falls within that range. Poor soil compaction during installation, inadequate drainage, freeze-thaw cycles, heavy vehicles, and tree roots can all shorten its life. Deicing salts can also wear down the surface over time, leading to flaking and pitting.
Regular care helps your concrete reach its full lifespan. Seal the surface every few years to protect against moisture and stains, fill small cracks promptly before water can seep in and widen them, and make sure gutters and downspouts direct water away from slabs. Knowing your concrete’s age also helps you decide whether a repair is worthwhile or replacement is the better choice.
Lifting Sunken Concrete With Slab Jacking
When a slab sinks but is otherwise in decent shape, you may not need to tear it out. Slab jacking, also called mudjacking, is a common method for raising settled concrete back into place. A contractor drills small holes in the slab and pumps a grout mixture underneath, filling voids and lifting the concrete to level. A similar technique called polyjacking uses expanding foam instead of grout.
Homeowners tend to be pleased with the results. ConcreteCaptain reports that about 90 percent of homeowners say they’re satisfied with slab jacking as a way to level sunken concrete. The process is usually much faster and less expensive than replacement, and the slab can often be used again within a short time.
Slab jacking works best on slabs that are sinking but not badly broken. After the lift, the drilled holes are patched, and any cracks can be sealed. To keep the problem from coming back, address underlying causes such as poor drainage or soil erosion near the slab.
When Replacement Makes More Sense
Sometimes concrete is too far gone to save. Widespread cracking, crumbling surfaces, large heaved sections, or slabs nearing the end of their expected lifespan may be better candidates for removal and replacement. Starting fresh also gives you the chance to correct grading problems and upgrade to a decorative finish.
Demolition costs and effort depend partly on how thick the concrete is. Lawn Love notes that concrete slabs generally range from 4 to 12 inches thick, but demolition contractors treat 4 to 6 inches as the standard thickness for removal. Thicker slabs or those reinforced with rebar or wire mesh may require heavier equipment and more labor.
When planning a replacement, get quotes that include demolition, debris hauling, base preparation, and the new pour. A properly compacted base, adequate thickness, and control joints help prevent future cracking and sinking, giving your new concrete the best chance at a long life.
Choosing the Right Fix
Damaged concrete doesn’t always mean a costly overhaul. By understanding your slab’s age, considering slab jacking for sunken sections, and knowing when replacement is the smarter investment, you can restore safe, level surfaces that look great and serve your home for years to come.