Build wall between two floor joists

[Aiver]

Hello. I am going to put up a wall to separate a bedroom from what will become a small bathroom. The house is from 1924. I have cut up the floor where the bathroom will be. The new wall will be placed between two floor joists.
Can I just build the wall on the edge where it is cut? Or is there a risk that the floor will flex?

 

[Bronken]

Without knowing the rest of the solution:
Screw the floor into an extra joist under the floor at the edge.
The wall construction, whatever it becomes, can perhaps then be screwed into the extra joist.

 

[Aiver]

Without knowing the rest of the solution: Screw the floor to an extra beam under the floor at the edge. The wall construction, whatever it may be, can perhaps then be screwed to the extra beam.

Yes, that's what I was thinking. But I'm unsure about how it should be attached. That is, if it should be attached to the other floor beams.

 

[MathiasS]

Spacers at CC60 and place the wall on these....

 

[Aiver]

Kortlingar på CC60 och ställ väggen på dessa....

Kortlingar between the floor joist visible in the picture and the one inside the floor edge?

 

[MathiasS]

That's right!

 

[MathiasS]

If you need support for floorboards/panels, you can screw on a piece of plywood under the wall stud that you lay on the noggings, between the noggings.

 

[Aiver]

Exactly!

Something like this?

 

[MathiasS]

Looks absolutely great!

Now with a wider wall and red plywood under the wall as support for the floor.

 

[Aiver]

Looks really great!

Now with a wider wall and red plywood under the wall as support for the floor.

[image]

Thanks, Mathias!
I initially thought of placing the wall on the old floor. But maybe it's better to build the wall directly on the beams?

 

[MathiasS]

It is difficult to advise on that without seeing exactly what the circumstances are. I thought you had already cut away the existing subfloor where the wall is to be, and then it seemed best to build from the ground up. Place the wall on something stable!