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Upstairs is fully responsible, the simplest truth, upstairs is not installed, and things downstairs can't be dropped.
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Consider yourself unlucky, people didn't let you be unfixed.
Generally speaking, the upstairs decoration will not cause damage to the wall of the downstairs bathroom, unless there is a serious violation of the demolition and alteration of the structure upstairs, and the downstairs tiles are cracked, it is recommended to check whether there is a hollow drum first, most of which are caused by the hollow drum in the tile paving.
The waterproofing upstairs was not done well, so the water seeped down. >>>More
You can complain to the property and ask the property to stop them from renovating. >>>More
The code stipulates that indoor ceilings and glass curtain walls cannot be directly hard-connected. The curtain wall and the interior decoration ceiling must be separated, and the connecting closing part should be left with 8-10mm construction joints glued and closed. Because the curtain wall design only considers the loads such as self-weight, positive and negative wind pressure, earthquake, etc., and does not consider the interior decoration load. >>>More
No, because there is water seepage upstairs, it will continue to seep water from the gap to the downstairs, treating the symptoms but not the root cause. >>>More