Frequently Asked Questions
How many 80lb bags of concrete are in a yard?
About 45 bags. An 80lb bag yields roughly 0.60 cubic feet when mixed; one cubic yard equals 27 cubic feet, so 27 / 0.60 = 45 bags. Bagged concrete costs $5-7 per bag, making it competitive only for small jobs.
How thick should a driveway slab be?
4 inches is standard for passenger cars on stable soil. 5 inches for SUVs/trucks. 6 inches if heavy trucks or RVs will use it. Reinforce with wire mesh or rebar in all cases for crack resistance over a 30+ year life.
How long until concrete is walkable?
24 hours for foot traffic with care. 7 days for normal walking. 28 days for full cured strength (3,000+ psi). Light vehicles can drive on at 7 days; heavy vehicles wait the full 28 days.
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