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The ceiling must go directly to the top, and the wired pipe can be threaded on it.
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The roof has been removed, which is convenient.
It won't be in series, otherwise one horn won't go off and all of them won't go off.
Resolutely walk on the ceiling and walls, and resolutely not go underground, just remember that it is a toilet.
The vast majority of water supply pipes are on the ground, first, the construction is simple, and second, in case of water leakage, the ceiling will suffer.
The laminated board seems to contain magnesium, titanium, and aluminum alloys, right? There are many types of laminated board ceilings, some are good and some are not good, magnesium titanium aluminum alloy ceilings are OK, it is recommended that you buy.
What kind of roof to hang is to be determined according to the overall design plan or decoration style of the room, and there are generally more flat roofs. The vaulted roof is generally in European style, and more is used.