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Could it be that some animal died and rotted in the dark? Or something moldy. You do a full cleanup.
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It should be a floor drain coming back.
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Check the drain and floor drain of the wash basin
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Agree with the upstairs, my family has also encountered such a problem, often when other people's homes flush, the smell of my home is particularly strong, it is estimated that it is a problem during construction.
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In fact, there is a problem with the trap.
You poke the drain in the ground.
If it doesn't work, I'll have to do it all over again.
Door furniture can be customized, find a local custom furniture manufacturer to measure the design, than buy the finished product, but also better than the carpentry site construction
According to the situation you described, after the tile is pasted, it falls off within half a year, which is caused by the difference in the expansion coefficient of cement and tile during installation, which belongs to the quality defect of the installation, and you can ask the party who installs the tile to re-install the tile for you, and the cost is borne by the installer.
It should be of bad quality, like ordinary, there is no problem, the house is generally not out of this situation My house has lived in it for five years, and it has only been renovated once.
There may be a blockage in the sewer, so ask the company that clears the sewer to check and repair it.
It's best not to shop online, don't be afraid of trouble, go to the hypermarket.