A durable concrete driveway in Atlanta starts with a compacted subgrade and gravel base, is commonly poured about four inches thick (thicker for heavy vehicles), uses an air-entrained mix, and has control joints at planned spacing. It should slope away from the house and be cured properly. The street apron often needs a local permit.
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A concrete driveway takes more abuse than almost any other slab around a home: the weight of vehicles, delivery trucks, summer heat, winter freezes and the water that runs off the roof and down the lot. A well-built driveway can last for decades. One poured on a poor base or without enough joints can crack and settle within a few years.
What goes into a durable driveway
- Tear-out and excavation. Old concrete or asphalt is removed and the soil is excavated to make room for a base.
- Subgrade preparation. Soft spots are dug out and the soil is compacted. On Atlanta's clay, this step matters more than almost anything else.
- Gravel base. A compacted layer of crushed stone provides uniform support and helps with drainage.
- Forms and slope. The driveway should be shaped so water drains away from the garage and house.
- Reinforcement. Many contractors use steel rebar, welded wire or fiber-reinforced mixes. Reinforcement helps hold cracks tight; it doesn't prevent them.
- Placing, finishing and joints. Control joints are tooled or saw-cut at planned spacing so shrinkage cracks form in straight lines.
- Curing. The slab is kept moist or sealed with a curing compound during its first days.
Thickness and mix
Residential driveways are commonly poured about four inches thick, with five inches or more often recommended where heavier vehicles, RVs or trucks will park. Mix strength, air entrainment and slump are worth discussing. Because the Atlanta area sees freeze-thaw cycles most winters, many contractors specify air-entrained concrete for exterior flatwork; the Portland Cement Association and American Concrete Institute both describe why it resists freeze-thaw damage.
Pouring in Georgia weather
Hot, dry, windy days make concrete set faster and dry at the surface too quickly, which can cause shrinkage cracks and a weak, dusty surface. Experienced crews often pour early in the morning in summer, dampen the base, and start curing promptly. In cold snaps, fresh concrete has to be protected from freezing. ACI publishes guidance on both hot- and cold-weather concreting.
The apron and the street
The section where a driveway meets the street, often called the apron, typically sits in the public right-of-way. Many Metro Atlanta cities and counties require a permit for new or replaced aprons and curb cuts, and some set requirements for thickness, sidewalk crossings and drainage. If your street is a state route, the Georgia Department of Transportation may be involved. Rules vary, so check with your local government before work starts, and ask the contractor who pulls any permit.
After the pour
- Stay off new concrete on foot until your contractor says it's ready, and keep vehicles off longer, often a week or more.
- Avoid deicing salts on new concrete during its first winter.
- Keep downspouts and runoff from undermining the edges.
- Consider a penetrating sealer, and ask your contractor when to apply it.
Questions to ask
- How thick will the slab be, and what base and reinforcement are included?
- Where will the control joints go?
- Who handles permits, tear-out and disposal of the old driveway?
- What does the warranty cover, and can you provide a certificate of insurance?
When you're ready, request a driveway contractor and include photos of the existing driveway.
Frequently asked questions
How long before I can drive on a new concrete driveway?
Foot traffic is often fine after a day or so, but contractors commonly advise keeping cars off for about a week and heavier vehicles longer. Follow your contractor's guidance, since mix and weather affect timing.
Do I need a permit to replace my driveway in Metro Atlanta?
It depends on the city or county. Many require a permit for the apron, curb cut or any work in the public right-of-way, and some require one for the whole driveway. Check with your local government before work starts.
Why did my new driveway crack?
All concrete shrinks as it dries, so some cracking is normal, ideally along control joints. Cracks outside the joints can come from joints spaced too far apart, a poorly compacted base, early heavy loads or rapid drying in hot weather.