There is yellow steam on the aluminum gusset on the ceiling of the bathroom

Judging from the picture, the gap is not evenly balanced, and if you flick it with a tool from the corresponding direction, it should be aligned, and there will be no big gap, try it.

It was the same in our family a few years ago.

It is caused by the lack of waterproofing upstairs, and it is necessary to coordinate with the residents upstairs to solve it. >>>More

If you have any objections to this, you can negotiate with the property to deal with it.

If the material is not good and not clean, it is the discoloration and oxidation of the material itself, some of which are black and some are yellow. The material itself is not resistant. >>>More

If you can't dismantle how to install it, that's an excuse, I'm afraid of responsibility, hehe! The warranty of waterproofing is 5 years, if the decoration company collects your waterproof money, you will look for them, if the warranty period is over, you don't need to look for them, unless you can prove that they have not done waterproofing! More information, better advice, free professional technical consultation on concrete waterproof leakage repair, free of the trouble of repairing today, leaking tomorrow, repairing every year, and leaking every year.