It's the first question everyone asks after a pour: "When can we use it?" Here's the timeline we give every customer, and the reasons behind it.
The short answer
- 24–48 hours: foot traffic is fine. Keep pets, bikes, and anything with wheels off.
- 7 days: passenger vehicles can drive and park on it.
- 28 days: concrete reaches its full design strength. Heavy trucks, RVs, and dumpsters should wait until now.
Curing isn't drying
Concrete doesn't harden by drying out — it hardens through hydration, a chemical reaction between cement and water that continues for weeks. That's why we take steps to keep moisture in the slab during the first days (curing compound, and in hot weather sometimes wet curing). Concrete that dries too fast ends up weaker and more crack-prone, permanently.
What the strength curve looks like
As a rule of thumb, concrete reaches roughly 50% of its strength in 3 days, 70% in 7 days, and 100% of design strength at 28 days. That 70%-at-a-week mark is why cars are fine after 7 days but we ask you to hold the moving truck a bit longer.
Weather changes the timeline
Cold: hydration slows dramatically below about 50°F. Cool-season pours need extra days before traffic — we'll tell you exactly how many. Hot: the surface can dry faster than the interior cures, so summer pours get extra curing protection. Either way, the walk/drive guidance we leave you with is tuned to the actual conditions of your pour.
Protecting your investment in week one
- Keep sprinklers off the slab for the first 24 hours (surface water can mar a fresh finish)
- No car traffic for 7 days — including turning wheels on the apron
- Don't let anyone chain, drag, or drop heavy objects on the new surface
- Hold off on de-icing salt for the entire first winter (see our winter protection guide)
Planning a driveway, patio, or slab project? We'll walk you through the whole schedule — from tear-out to the day you park on it — in your free estimate. Get yours here.