nikasp
I am planning to divide a large bedroom into two children's rooms and I'm wondering if there are any opinions on 70 or 95 mm stud walls? Besides the fact that a 95 mm insulated wall will be slightly quieter and have a bit more space for boxes, etc. Everything is a bit cheaper and easier but it doesn't matter much since the "big" car with a hitch will soon be back from vacation.

The house's empty original bongo drum walls with 70 mm studs and only 13 mm chipboard are being replaced with 12 mm plywood and 13 mm drywall along with stone wool insulation.
 
If you use double boards on both sides, the wall will be quite thick with a 95 stud. If there is going to be a door in the wall, I would aim to keep the total wall thickness the same as the door frame, i.e., about 95 for standard interior doors. Then you would need a 45 stud if you have double boards. 🙄
 
AXS
The 70-rule works well. For an even thinner wall, you can set the 70-rule the wrong way so it becomes like a 45-rule.

Steel rule in ceiling and floor, preferably shortlings for a bit more stable wall.
 
Claes Sörmland
The most important thing is that the studs against the floor, existing wall, and ceiling are sealed so that sound does not travel that way. It can easily become a gap of a couple of mm and then the rest of the wall doesn't matter for sound comfort.
 
nikasp
I have almost decided on 70 mm. I'm thinking of using steel studs with sealing/foam against the floor and ceiling, and wood studs for the rest. Or maybe I should go with metal against the wall and brace them with noggings so hopefully, it will be quiet between the rooms.
 
nikasp
If you have 45 mm, there is hardly any room for boxes.
 
A
Drive 70 wall, 45 walls just become weak and crooked..
 
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nikasp
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nikasp
Yes, 45 has not been an option at all. Maybe building a toilet in the torp with 45 where every centimeter counts and a small and low wall but not at home in the villa.
 
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