Concrete Curing Time: When You Can Walk, Drive and Build on It
Concrete should be cured for 3 to 7 days (NRMCA); you can walk on it after about 24 hours, drive a car on it after 7 days and park heavy vehicles after 28 days (Concrete Network).
Key takeaways
- Cure 3–7 days, moist and above 50 °F (NRMCA).
- Walk after 24 hours; cars after 7 days; heavy vehicles after 28 days (Concrete Network).
- About 70% strength at 7 days.
- Dried-out concrete can lose up to 50% strength.
How Long Does Concrete Take to Cure?
Curing should continue for 3 to 7 days after placement and finishing, according to NRMCA's "Curing In-Place Concrete" sheet. Concrete keeps gaining strength after that; its specified strength is measured at 28 days (2021 IRC Table R402.2).
Concrete Curing Timeline
| Time after the pour | What is safe | Source |
|---|---|---|
| 24 hours | walking on a broom- or trowel-finished slab | Concrete Network |
| 3–7 days | keep curing (moist, above 50 °F) | NRMCA CIP 11 |
| 7 days | driving and parking a car; about 70% of potential strength | Concrete Network |
| 28 days | RVs and large trucks; specified strength test age | Concrete Network; IRC |
How Long Before You Can Drive on Concrete?
You can usually drive and park a car on a new concrete driveway 7 days after placement, and heavier vehicles such as RVs after at least 28 days, according to Concrete Network. Weather and mix change the timing.
How to Cure Concrete
- Start curing right after finishing.
- Keep the surface moist with water, wet coverings or a curing compound.
- Keep the concrete above 50 °F (10 °C).
- Continue for at least 3 to 7 days.
Why Curing Matters
Concrete left to dry can lose as much as 50 percent of its potential strength compared with moist-cured concrete, according to NRMCA.
Curing in Cold or Hot Weather
Temperature changes the rate of hydration: NRMCA advises keeping concrete above 50 °F during curing, and notes that concrete gains early strength quickly at high temperatures but later strength may be reduced.
Curing Time for a Driveway, Slab and Footing
| Element | Keep curing | First use |
|---|---|---|
| Driveway | 3–7 days | cars after 7 days; RVs after 28 days |
| Patio or slab | 3–7 days | foot traffic after 24 hours |
| Footing | 3–7 days | build on it per your contractor and plans |
Does Spraying Water on Concrete Help It Cure?
Yes, keeping the surface wet is one of NRMCA's moist-curing methods, along with wet coverings and curing compounds; ponding is the most thorough water method.
Curing vs Drying
Curing means keeping moisture in so the cement keeps reacting; drying means losing water. Concrete that dries too early can lose as much as 50 percent of its potential strength (NRMCA CIP 11).
How Long Does 4 Inches of Concrete Take to Cure?
A 4 in slab follows the same schedule: cure for 3 to 7 days, walk after about 24 hours and drive a car after about 7 days.
How to Speed Up or Slow Down Curing
Temperature drives the rate: warm concrete gains early strength quickly but may lose later strength, while cold concrete must be kept above 50 °F (NRMCA CIP 11). Accelerating admixtures and blankets are options to discuss with your ready-mix producer.
Concrete Curing Time FAQ
Can I walk on concrete after 4 hours?
No, wait at least 24 hours before walking on a broom- or trowel-finished slab (Concrete Network).
How long should concrete cure before building on it?
Keep it curing for 3 to 7 days; full specified strength is measured at 28 days, so follow your plans for loads.
How long does 6 inch concrete take to cure?
A 6 in slab follows the same curing period of 3 to 7 days (NRMCA); traffic times follow Concrete Network's 24 hours, 7 days and 28 days.
How long does concrete take to set in 70 degree weather?
Our sources do not give an hour figure by temperature; follow the walk-after-24-hours guide and keep the concrete above 50 °F while it cures (NRMCA).
Next step
Plan the pour date around the weather and order with how to order ready-mix concrete.
Official sources
Last reviewed 2026-11-05. Numbers come from our tested engine; see how we calculate and our sources.