Question 1

How many 80 lb bags per cubic yard?

Accepted Answer

Approximately 45 bags of 80 lb concrete = 1 cubic yard. Each 80 lb bag yields ~0.60 ft³. Always add 10% waste.

Question 2

When should I use bags vs. ready-mix?

Accepted Answer

Under 0.5 yd³ → bags are cheaper. Over 0.5 yd³ → ready-mix truck is more economical. Short-load fees apply under 8 yd³.

Question 3

What PSI concrete for a driveway?

Accepted Answer

3000-4000 PSI with 4-6 inch thickness. Use 4000 PSI for heavy vehicle traffic. Always check local building codes.

Question 4

Do I need rebar or wire mesh?

Accepted Answer

Wire mesh for patios/walkways (non-structural). Rebar (#3 or #4) for driveways, garage floors, structural slabs. 12-18 inch grid spacing.

Question 5

What does a yard of concrete cost in 2026?

Accepted Answer

National average: $130-190/yd³ for 3000 PSI. Northeast/West Coast higher ($160-200). Southeast/Midwest lower ($120-150).

Question 6

How thick should a concrete slab be?

Accepted Answer

Patios/walkways: 4 inches. Driveways: 5-6 inches. Garage floors: 5-6 inches. Commercial/heavy: 6-8 inches. Check local code.

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