Crack in 2k floor coating garage

Sorry, screed is for me the last layer of the floor made of concrete or cement, etc.

The crack is clearly visible in the morning when it is cool, and in the evening when it is hot, you can't see it at all anymore. That's how much the concrete underneath expands and contracts.

How was the base plate made? If there is reinforcing steel in the correct position, there will be no movement in a crack that you can see with the naked eye. Nowadays, every small construction progress is photographed. Just place a plaster mark on it, then you can see it. That can also be well documented.

Sorry, screed is for me the last layer of the floor made of concrete or cement etc.

Just for your information by the way

[*]Concrete is a composite material made of cement, sand, gravel, and water and is used for load-bearing structures.
[*]Screed is a layer of cement mortar on the floor that serves as a base for floor coverings.
[*]Cement is the binder that is the main component in concrete and can also be used separately in various construction applications.

And in general, we are all still eagerly waiting for pictures!