Question 1

How thick should a concrete driveway be?

Accepted Answer

A standard residential driveway should be 4 inches thick minimum. For heavy vehicles or areas with poor soil, use 5–6 inches. Commercial driveways typically require 6 inches.

Question 2

How much does a concrete driveway cost?

Accepted Answer

A poured concrete driveway costs $4–$15 per square foot installed, depending on thickness, finish, and regional labor rates. A typical two-car driveway (20x40 ft) runs $3,200–$12,000.

Question 3

Do I need rebar in a driveway?

Accepted Answer

Yes — use #4 rebar (1/2-inch) at 18-inch centers in both directions for residential driveways. Rebar prevents cracking and adds tensile strength that concrete alone lacks.

Question 4

What PSI concrete for a driveway?

Accepted Answer

Use 4000 PSI minimum for residential driveways. In freeze-thaw climates, specify air-entrained 4000 PSI to prevent surface scaling.

Question 5

How long before I can drive on new concrete?

Accepted Answer

Wait at least 7 days before driving on new concrete. Avoid heavy vehicles (moving trucks, RVs) for 28 days while the concrete reaches full strength.

Question 6

Do I need an expansion joint in a driveway?

Accepted Answer

Yes. Install expansion joints every 8–10 feet and at the garage floor connection. Saw-cut control joints prevent uncontrolled cracking.

Question 7

How thick should the gravel base be?

Accepted Answer

A 4-inch compacted crushed stone base is standard for residential driveways. In clay or expansive soil, increase to 6–8 inches.

Question 8

Can I pour my own concrete driveway?

Accepted Answer

A skilled DIYer can pour a small driveway section, but larger pours require a team of 3–4 people and must be completed before the concrete sets. Most homeowners hire a contractor for driveways.

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