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1. During the decoration of all houses, part of the decoration materials and walls are watered, because the air circulation in the house is not adjusted in time after the decoration, the water vapor and decoration materials gather together for a month, and you will see the white hair.
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Where you live, how many floors, and how humid it may be.
Replacement can be made.
After the damaged tiles are removed, the ground needs to be painted to plug the leakage before the ground is replaced with new bricks. >>>More
The tile used has a small carcass density, and when there is water, it will penetrate in, and then the traces can be seen on the surface. In general, the quality is not good enough.
The ventilation system is not good.
If it is not caused by you, but the problem of the house itself, the landlord will compensate for it. Experience it for yourself.
Is that a problem? It may be that the master was not serious and responsible enough to deal with the gaps at that time, and he coped with the construction sloppily. No problem.