Concrete doesn’t “dry” — it cures. Curing is a chemical reaction (hydration) between cement and water that continues for weeks after placement. Understanding curing times helps you avoid damaging your pour before it’s ready.
Concrete curing timeline
| Time after pour | What you can do |
|---|---|
| 4–8 hours | Surface starts to harden. Do not touch or disturb. |
| 24 hours | Formwork can usually be removed. Cover with polythene or damp hessian to protect. |
| 24–48 hours | Light foot traffic OK. No heavy loads. |
| 7 days | ~65% of design strength. Light vehicles can drive on. |
| 14 days | ~85% strength. Normal use for most domestic surfaces. |
| 28 days | 100% — design strength reached. Full load-bearing use. |
How to cure concrete properly
- Cover it. Use polythene sheeting, damp hessian or curing compound. Keeps moisture in.
- Keep it damp. Mist with water twice a day for the first 3–7 days in warm weather.
- Avoid extremes. Ideal curing temperature is 10–20°C. Protect from direct sun, wind, and frost.
- Don’t rush. Wait the full 7 days before any loads, 28 days for heavy use.
Curing in cold weather
Below 5°C, concrete curing slows dramatically. Below freezing, water in the mix can freeze and destroy the concrete. In winter:
- Use a rapid-set or accelerator admixture (we can add these on-site)
- Cover with insulated blankets to retain heat
- Avoid pouring on frozen ground
- Check the forecast — delay pours if hard frost is expected within 48 hours
Curing in hot weather
Above 25°C or in windy conditions, concrete dries too fast and cracks. Solutions:
- Pour in the early morning or evening
- Wet the sub-base before pouring
- Use a retarder admixture to extend workability
- Cover immediately with polythene once finished
- Mist regularly with water for the first 3 days
Ordering concrete
Same Day Concrete supplies volumetric concrete with any admixture your project needs — rapid-set, retarder, plasticiser, fibres. Get an instant quote or read our what is volumetric concrete guide.
FAQs
How long before I can walk on new concrete?+
Usually 24–48 hours after pouring, depending on the mix and weather. Light foot traffic is safe once the surface is firm and no longer marks.
How long before I can drive on new concrete?+
Wait at least 7 days for a car, and 28 days before driving heavier vehicles. This gives the concrete time to reach sufficient strength.
When does concrete reach full strength?+
Standard concrete reaches its 28-day design strength after — as the name suggests — 28 days of proper curing. It continues to gain strength very slowly for years afterwards.
Should I cover new concrete?+
Yes. Cover with polythene sheeting or damp hessian for the first 3–7 days to slow moisture loss and improve curing. This is especially important in hot or windy conditions.