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The method you said can't solve it, you have to cut a hole from the roof.
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No, because the gas goes up, it has to be opened on the top floor.
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It should be on the main sewage riser on the second floor, add an oblique tee, through the exterior wall to the top floor, higher than the top of the building, and install a ventilation cap. If there is a fifth floor, an oblique tee should also be added to the riser on the fifth floor to connect with the outside ventilation pipe.
A lot of people don't want balconies at first, and they are troublesome to do hygiene, and all of them are closed! >>>More
If you have a kitchen, you can leave it without it, and if you don't have a kitchen, you should set aside the place in the kitchen, which is better.
To build a house in the countryside, if the balcony wants to look good, it must have floor-to-ceiling windows and large balconies, and the side of the balcony must face the sun. >>>More
Are there any construction conditions that have been fixed and cannot be changed: for example, the location of the well, septic tank, balcony, staircase, etc., has been determined, ......
I think it's much better to look at it in this way than to build a wall, it's beautiful and practical, and you can leave a window if you want, hehe.