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Mr. Zhang's Home Leak Plugging Kit is the best way to solve this type of leakage problem.
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Where this is to be seen on the spot.
There is a leak upstairs - combine the actual situation and work with the upstairs neighbors to solve the leakage problem!
If the kitchen is not covered with underfloor heating, it has nothing to do with your wool. If there is water vapor, it may also be caused by the temperature of your own house on the 5th floor.
Through your description, your home is on the fourth floor, but when it rains, the balcony leaks, there are two ways to solve this problem, the first is you to find the property, now the old building is generally managed by the government, because the old building property will lose money, you just look at the building, what is going on on the fifth floor, you negotiate to repair it together or find a way, I hope my answer can help you.
Inform the property and the developer.
You live on the sixth floor, opposite the sixth floor of the community, from the foot is facing your balcony, this doesn't matter, this is no problem.