How would you do it here? I'm going to build a new bathroom and will partition off a room that has a tongue-and-groove plank floor. I was thinking it might be easiest to attach the bottom sill to the floor and then saw away the portion that becomes the bathroom, or is that a bad idea? The floor outside the bathroom will remain as it is.
Then I'm wondering if it will be sufficiently stable with 70 studs? After all, there will be OSB+gypsum on the outside and 15 mm plywood+gypsum inside the bathroom, so maybe that's enough.
Then I'm wondering if it will be sufficiently stable with 70 studs? After all, there will be OSB+gypsum on the outside and 15 mm plywood+gypsum inside the bathroom, so maybe that's enough.
What do you think about attaching the sill to the floor?
A bit doubtful I would say, you could possibly cut away on the inside of the new wall on the bathroom side and then insert a new joist underneath which you screw from the top side into the old floor before you place the wall there. If you don't, the wall will be hanging on the floor and that's probably not good when you open the bathroom floor.
The wall will be perpendicular to the floor rules, so that's probably not an issue. The challenge will be reinforcing the joists for the new bathroom.
Ok, then you can probably write the old floor from above in the new beam on the floor before building the wall. You probably don't want any flex in the floor that's going to remain. I would probably put a beam underneath to make it steady. In the bathroom, nogging between the joists at 30 cm centers. Solid attachment like long screws and a bit of glue...
Waiting for the wall to floor to be opened so I can see if there is any support for the extra floor joists that are going there.