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In the field of construction, the constraints are always very strong in terms of turnaround times. So that the mason is sometimes tempted to work, even in the rain to complete the work in time. Today, the question is whether it is possible to pour concrete in the rain. Answer below...

Can we pour concrete in the rain?

Can we pour concrete in the rain?

Pouring concrete in the rain, is it possible?

Above all, it must be said that it is quite possible to pour concrete in the rain. But is it really reasonable? As the concrete is composed of gravel, sand and cement, it becomes hard on contact with water. The outside temperature also plays a role. When it is too hot, the mixing water evaporates too quickly, which can compromise the setting of the concrete. In this case, it is necessary to regularly sprinkle water.

Pouring concrete in the rain is therefore possible, but we must pay attention to marks and imperfections that may appear.

How to pour concrete when it rains?

Even if it is possible, pouring concrete in the rain is not a wise approach. There are, indeed, many disadvantages to this operation. First, raindrops can mark the surface of the structure. Then there is the risk of efflorescence (appearance of salt on the surface of the masonry), leaching, but also the risk of exudation (seepage of the mixing water). In any case, the surface of the masonry is not smooth. Imperfections are visible and the finishes will not be of quality.

The flow of ciment on the bricks is also to be feared. Once again, spots can appear. To prevent traces from becoming encrusted and difficult to remove, the professional mason must react without delay. He must get rid of excess cement with water.

Prevention is required

Given the many disadvantages of pouring concrete in the rain, it is best to avoid doing so in rainy weather. If drops begin to fall in full masonry (especially if a downpour is announced), it is strongly recommended to cover the still fresh work. One can for example use a protection profile (preferably plastic). Other types of tarpaulins can be used.

The key is to make sure the masonry is well ventilated. And in addition to covering the structure, it is also necessary to install a rainwater evacuation system to prevent runoff from spoiling all the work already done.


Video Instruction: Pouring concrete in heavy rain!