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A small amount should not, because the bathroom is waterproof, but it is dangerous if the amount of water is large.
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No, most bathrooms are waterproofed.
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Generally, no, only if the water is too large will seep downstairs
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If you are waterproof, no matter how much water you have, you will be fine.
It is recommended to use grout agent to grout the floor tiles in the later stage.
Cleaning with acidic toilet cleaner solution can effectively neutralize urine alkali, and then wash with water to remove odor.
Floor tiles used in bathrooms generally do not have the function of preventing water seepage. So it will leak.
As long as the tiles are waterproofed before they are laid, there will be no water seepage. It can be supplemented with caulk.
Not suitable, not conducive to drainage. Hope!