How long should new concrete cure before I drive on it?
Keep cars off until the slab reaches the strength its mix is designed for, and ask the contractor for that date in writing. As a benchmark, VDOT keeps vehicles off its new concrete sidewalks for 14 days, or less if design strength is reached sooner. Allow longer in cool weather, keep heavy trucks off until the contractor confirms full strength, and keep the slab moist for the first week.
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By Kasra Taheri, Founder, LoclisPublished
Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.
Step by step
Read when to stop and call a pro, further down this page, before you start.
Step 1: Write down the pour date and mix
Ask the contractor for the mix and its specified strength, and when they say the driveway can take cars and trucks.
Step 2: Keep it moist
Keep the slab covered or damp for 5 days in weather at 70 F or warmer, or 7 days at 50 to 70 F.[2]
Step 3: Block the driveway
Put sawhorses, cones or tape across the entrance so delivery drivers and visitors do not pull in.
Step 4: Walk on it only when hard
Stay off until the surface is hard; Quikrete gives even its high early strength mix a walk-on time of 10 to 12 hours.[3]
Step 5: Wait for strength before cars
Keep cars off until the slab reaches its design strength; VDOT keeps vehicles off its new concrete sidewalks for 14 days, or until that strength is reached if sooner.[1]
Step 6: Add time when it is cold
Allow longer in cool weather, and keep the slab covered so it stays above 40 F for the first 72 hours, as VDOT requires on its pavement work.[1]
Step 7: Hold off heavy trucks
Keep moving vans, dumpsters and delivery trucks off until the contractor confirms the slab has reached its design strength; Quikrete lists its general-purpose mix at 4000 psi only at 28 days.[2]
Step 8: Skip the salt the first winter
Avoid salt and other deicers on new concrete for about a year, and use sand for traction instead.[5]
Step 9: Mind the curing compound
Do not use a curing compound in late fall on a surface that will see deicers, since it can stop the concrete drying out properly.[2]
Keep cars off a new concrete driveway until it has reached the strength its mix is designed for. Your contractor knows the mix and the weather it went in, so ask for the date in writing; their instructions for your slab come first. If you have nothing else to go on, the Virginia Department of Transportation's rule for its own concrete sidewalks is a sensible benchmark: no vehicles for 14 days, or less if the concrete reaches its design strength sooner. Cool weather and heavy trucks both call for more time.
How VDOT handles it
For the concrete sidewalks VDOT builds, its specification says: "Vehicular traffic shall be excluded for the first 14 days or until the minimum design compressive strength is attained, whichever is the lesser time."[1] It also says sidewalks are not opened to pedestrian traffic for the first 5 days.[1]
Read that rule the right way round. Fourteen days is the longest VDOT waits; concrete that reaches its design strength sooner can open sooner. Confirming that strength takes a test a homeowner usually cannot do, so unless your contractor gives you a date for your mix, the 14-day mark is the safer one to use.
Why it takes days, and longer for trucks
Concrete hardens in hours but keeps gaining strength for weeks. Quikrete lists its general-purpose Concrete Mix at 2500 psi at 7 days and 4000 psi at 28 days,[2] so at one week it has a little over 60 percent of its rated strength. A faster mix moves the dates up: Quikrete rates its high early strength 5000 mix at 1500 psi after 1 day, 3500 psi at 7 days and 5000 psi at 28 days, with a walk-on time of 10 to 12 hours.[3] Ready-mixed concrete varies the same way, which is why the contractor's answer for your mix matters.
A car is not the hard case. A loaded moving van, a dumpster drop or a concrete truck for the neighbour's job puts far more weight on the edge of a young slab. Keep heavy vehicles off until the contractor confirms the slab has reached its design strength. Thickness matters too: Quikrete says 4 inches is enough for passenger cars, and 5 or 6 inches is recommended where trucks and other heavy vehicles will use it.[4]
Curing is what makes the wait work
Waiting only helps if the slab stays moist. Quikrete calls curing "one of the most important steps in concrete construction" and says it should continue for 5 days in warm weather at 70 F or higher, or 7 days in colder weather at 50 to 70 F.[2] Leave the plastic, burlap or curing compound alone for the first week.
Cold weather stretches everything
Cold slows concrete down and freezing can ruin it. Quikrete says to protect concrete from freezing during the first 48 hours.[2] VDOT's pavement specification goes further: its contractor must keep the surface of the concrete from falling below 40 degrees F during the first 72 hours after placement, and leave protective material in place for an additional 48 hours if freezing air temperatures are expected to continue.[1]
If yours went in late in the year, add days to the wait and ask the contractor how it was protected.
The first winter
New concrete is most easily damaged by deicers. The Town of Berryville tells residents that new concrete has a "curing" period of approximately a year and asks them to avoid salt and other deicers on it for approximately one year, with sand among the alternatives that improve traction.[5] Hose off salt that cars bring in as well.
Quikrete adds not to use curing compounds during late fall on surfaces where deicers will be used, because they can keep the concrete from air drying, which helps it resist deicer damage.[2]
Stop and call a pro if
- The slab froze in its first few days, or the surface is flaking or dusting.
- Cracks appear after someone drove on it early, or there are tire ruts in the surface.
- A corner or edge has broken off, which usually means a heavy load near the edge.
- One panel has settled below its neighbour.
Why new concrete cracks explains which cracks are cosmetic. If you are planning a new slab, see how to pour a small concrete slab or what to ask a concrete contractor.
Getting help in Virginia
Loclis lists DPOR-licensed concrete businesses with their licence number and class. Look up concrete contractors in Blacksburg, browse concrete and flatwork, or see all concrete and hardscaping answers.
If a new slab is already damaged, describe it once and licensed local concrete businesses quote the repair.
Common questions
- Can I drive on new concrete after 3 days?
- It is safer to wait. A general-purpose bagged mix such as Quikrete Concrete Mix is rated at 2500 psi only at 7 days and 4000 psi at 28 days, so at 3 days it is well short of its design strength. VDOT keeps vehicles off its new concrete sidewalks for 14 days, or until the concrete reaches its design strength if that comes sooner. If your contractor used a high early strength mix and says otherwise, follow their written instructions.
- When can I walk on a new concrete driveway?
- Once the surface is hard enough not to mark. Quikrete gives its high early strength 5000 mix a walk-on time of 10 to 12 hours; ordinary mixes and cool weather take longer. VDOT keeps pedestrians off the sidewalks it builds for 5 days, so keep it to light, careful walking at first.
- How long before I can park a heavy truck or RV on it?
- Longer than for a car. Concrete keeps gaining strength for weeks, and mixes are rated at 28 days. Keep heavy vehicles off until the contractor confirms the slab has reached its design strength, and check that it was built thick enough: Quikrete recommends 5 or 6 inches where trucks will use a driveway.
- Does cold weather change the wait?
- Yes. VDOT requires its contractors to keep the surface of new concrete from falling below 40 F for the first 72 hours, and to leave protection in place 48 hours longer if freezing weather continues. In late fall or winter, add days to the wait and ask the contractor how the slab was protected.
- Can I salt my new driveway this winter?
- Avoid it if you can. The Town of Berryville asks residents to avoid salt and other deicers on new concrete for approximately one year, and suggests sand for traction. Deicer damage, it notes, is not generally eligible for warranty repair or replacement.
Sources
- [1] Road and Bridge Specifications 2020, Sections 217, 316 and 504, Virginia Department of Transportation. Checked October 26, 2026.
- [2] QUIKRETE Concrete Mix No. 1101 data sheet, The QUIKRETE Companies. Checked October 26, 2026.
- [3] QUIKRETE 5000 High Early Strength Concrete Mix spec data, The QUIKRETE Companies. Checked October 26, 2026.
- [4] Concrete Driveways and Curbs (project instructions), The QUIKRETE Companies. Checked October 26, 2026.
- [5] Notice Regarding New Concrete, Town of Berryville, Virginia. Checked October 26, 2026.
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