How long does concrete need to dry before it can be rained on?

If the concrete is still fresh (around 2-4 hours after pouring), it’s important to cover the surface to protect it. However, once the concrete has been finished (between 4-8 hours after pouring), and has set hard enough for walking on, the effects of rain should be minimal.

Can concrete be poured after rain?

Surprisingly, yes, you can pour concrete in the rain. Concrete does not dry, it cures. Curing is a chemical reaction and not a physical one, so rainwater won’t kill concrete. While dry weather and smart planning is always recommended for any new concrete installation, it’s not a necessity.

Can you pour concrete in standing water?

Never pour concrete into a hole if there is standing water in it. Excess water increases the water-to-cement ratio in the concrete mix, which also reduces the strength of the concrete.

How long does it take 2 inch concrete to cure?

Concrete typically takes 24 to 48 hours to dry enough for you to walk or drive on it. However, concrete drying is a continuous and fluid event, and usually reaches its full effective strength after about 28 days.

How do you fix rained concrete?

The primary method to repair a rain-damaged concrete surface is diamond grinding. Areas where the water diluted the surface paste should be ground to remove the weak top layer.

How soon should I water concrete after pouring?

To put it simply, the goal is to keep the concrete saturated during the first 28 days. The first 7 days after installation you should spray the slab with water 5-10 times per day, or as often as possible. Once the concrete is poured the curing process begins immediately.

How do you protect concrete from rain?

Even if rain isn’t predicted, you should always be prepared to cover the concrete with a tarp or plastic sheeting just in case. Make sure to seal the edges so rainwater can’t seep underneath. Also scope out the jobsite before the project begins, looking for the presence and location of gutters and downspouts.