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It can be approved by the mason, or it can be approved by the brick-laying man, and then the brick-laying is waterproofed and then tiled. He'll do a better job of waterproofing. Plumbers do it roughly.
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Masons are good, masons are professional, water and electricity can be done, but not their strong point.
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Anyone with experience will do.
Halo ...
Just cement and sand. >>>More
Water and electricity are used for toilet drainage, and when making straight pipes between each reserved hole, the distance between the toilet or wash basin and the wall should be determined.
If you don't check the drainage checkpoint, you can't do it, in case you don't hold it tightly, the mud master wraps it up, and only then does it find that the water is leaking! Then you have to knock out the wrapped pillars, the impact will be great, it's best to check the bag!
Vents to vent odors to the outside.
Do hydropower first, and then do waterproofing developers do poor waterproof quality, or do it yourself again, Dongfang Yuhong, JCDecaux waterproof quality is very good, as for the process, or let them do it themselves, you just have to pay.