Is rain harmful to concrete slabs?

hello,
yesterday the foundation slab was laid (poured) at our place

but it seems to be raining these days.

what does that mean for the fresh concrete slab?

the bricklayer put a plastic mat over the fresh concrete... are there any side effects from that? Doesn't the concrete need to be able to breathe?

Hello Sammy, first of all, welcome to the forum. Technically, I am certainly not an expert, but generally speaking, there is very little information for quite a complex topic. On the other hand, this question is not so exclusive that it couldn’t be answered by searching the internet. The nature of your question (and your age) makes me suspect that you haven’t necessarily dealt much with the topic of house construction. Are you building with GU/GÜ, BT, or an architect? Don’t you have an expert? I mean, if you’re already worried now, how are you going to get through the next weeks and months? The forum can contribute its part but can neither provide free construction supervision nor competent error monitoring. And now I come back to your question and encourage you to understand the topic of house construction yourself. Why should a floor slab breathe? Why should a house even breathe? It doesn’t even have lungs. What is concrete made of? And what happens if one of these components (in this case water) is present in too large an amount? And what could a plastic sheet be good for? Oh yes... and see if you can find anything about concrete curing.

hello,
yesterday our foundation slab was laid (poured)

but it seems to be raining these days.

what does that mean for the fresh concrete slab?

the mason put a plastic sheet over the fresh concrete... Are there any side effects? Doesn't the concrete need to be able to breathe?

The best curing for the concrete. It doesn't matter at all.

The plastic sheet is placed on it to prevent the water from evaporating too quickly.

So everything is in the clear.

Concrete does not need to breathe, it is already dead. The water in the concrete should not evaporate but cure; otherwise, cracks can occur. Therefore, a covering foil is almost always placed on it. Otherwise, concrete also hardens under water. Since heat is released during this, cooling is not so bad. Expansion and thus cracks are avoided.

People, which protective film can you recommend?

The cheapest one that does not travel with the next wind.