What is the reason for the water leakage in the ceiling of the living room?

Of course it's not upstairs, your expansion screws can't penetrate the floor, and the floors are between 10 and 12. If it is a cast-in-place roof, it may be that there is a pipe buried inside the cast-in-place roof, which is not a matter of the upstairs house, it should be a matter of structural construction, but the probability of this situation is very small.

Heh....Gab. It's not that there is water in the floor, it must have hit the wire casing, because when they built the house, they buried the wire pipe in advance, so there was water into the wire pipe, so it was you workers who hit the wire pipe, let the workers check the pipe, to see if there is any damage to the wire! My husband is a carpenter, so he knows about it!

If you answer correctly, give me extra points! ...

If the borehole is not the direction of the lamp line pipe, or the vibrating rod is not in place during the construction of the house floor, resulting in the local formation of space water. How can there be geothermal heating in Shiyan, Hubei, and the geothermal heat is not in the middle of the floor slab, but on the floor slab.

No big problem, because the cast-in-place floor slab can not shake the home, resulting in a local space containing water, and is enclosed in the floor slab, no source of water do not need to panic!

It may be caused by underfloor heating, water pipe rupture.

You can go to the happy decoration network to ask, it is a forum.