What if it rains 12 hours after pouring concrete?
Experiencing rainfall twelve hours after pouring concrete is generally not harmful to the structural integrity of the slab, provided the concrete has already undergone initial setting and hardening. Concrete typically achieves its initial set within a few hours, meaning a light rain or steady shower after twelve hours will not wash away the cement paste or pit the surface. In fact, moisture is beneficial during the curing process, helping concrete retain hydration and develop maximum compressive strength. Contractors only worry about heavy rain occurring immediately during the mixing, pouring, or finishing phases, while rainfall twelve hours later often acts as a natural curing aid.
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