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This is not recommended. The water-retaining stone is the whole, and the waterproof effect is good.
The function of the water retaining strip is mainly to prevent the floor leakage from being discharged for a while, and it is not much more than the shower splashing water. When the shower is turned on, it is possible that the floor drain will not be able to keep up for a while.
Yes, as long as the water doesn't submerge the wooden door frame.
Generally, artificial stone is used, which is easier to match with tiles and looks more coordinated.
THE USUAL PRACTICE IS TO PASS THE STONE 1CM HIGHER THAN THE BATHROOM FLOOR, SO AS TO AVOID WATER RUNNING OUTSIDE WHEN THERE IS WATER ON THE BATHROOM FLOOR.
The width of the toilet shower room retaining strip is generally 3 cm, 5 cm and 6 cm, and most of the shower rooms currently use 5 cm.