How long does a new concrete driveway need to cure before parking vehicles on it in Moncton?

Wait a minimum of 7 days before parking a passenger vehicle on a new concrete driveway in Moncton, and a full 28 days before allowing heavy vehicles like trucks, SUVs with trailers, or delivery vehicles.

Concrete does not "dry" — it cures through a chemical reaction called hydration, where water reacts with cement to form the crystalline structure that gives concrete its strength. At 7 days, a properly mixed driveway slab has reached roughly 70% of its design strength. At 28 days, it reaches its full rated strength (typically 25-32 MPa for an NB driveway). Walking on the slab is fine after 24-48 hours, but the weight of a vehicle — even a standard car at 3,000-4,000 lbs — concentrated on four small tire contact patches creates significant point loading that fresh concrete simply cannot handle safely in the first week.

Moncton's climate adds an important layer to this. If your driveway is poured in the spring or fall — which is common given NB's May-October pouring window — cooler temperatures slow the hydration reaction considerably. Concrete cures roughly twice as slowly at 10°C as it does at 20°C. A driveway poured in late September or October in Moncton, when overnight temperatures are regularly dipping to 5-8°C, may need 10-14 days before it's ready for vehicle traffic. Your contractor should be monitoring temperatures and may apply insulating blankets overnight to keep the curing reaction moving.

A few practical tips for the curing period:

Keep the surface moist for the first 7 days. If the weather is hot and sunny — common in Moncton in July and August — the surface can dry out faster than the hydration reaction consumes the water, leading to surface cracking and a weakened top layer. Your contractor may apply a liquid curing compound (which seals in moisture) or cover the slab with wet burlap and plastic sheeting. Don't let sprinklers hit it repeatedly and then let it bake dry between cycles.

Avoid turning your steering wheel while the vehicle is stationary on fresh concrete, especially in the first two weeks. The scrubbing force of a turning tire on a stationary vehicle is surprisingly damaging to a surface that hasn't fully hardened.

Once the 28-day mark passes, apply a penetrating silane/siloxane sealer before winter. This is non-negotiable in Moncton. With 150+ freeze-thaw cycles per year and road salt splashing off Moncton streets from November through April, an unsealed driveway will begin scaling and spalling within a few seasons. A quality penetrating sealer ($40-$80/gallon, covering 150-300 sq ft) repels water and salt without changing the appearance of the concrete. Reapply every 2-3 years.

If your contractor poured an air-entrained mix (which any reputable NB contractor should be using for exterior flatwork), your driveway is already better equipped to handle Moncton winters. But the sealer is still your best defence against salt damage over the long term.

Need help finding a concrete contractor in the Moncton area? New Brunswick Concrete can match you with local professionals for free through the New Brunswick Construction Network.