Older house install OSB+drywall

[Timbuktu]

Hey! I have a 75 sqm ground floor that's old and smells bad; the previous owner smoked.

All the electrical wiring is surface-mounted, and the plan is to embed it in the walls since all the surfaces need to be redone due to the smell.

As plasterboard and so on for 75 sqm costs me 20,000 SEK, although it's a lot of extra work, but still haha. And I get an insight into the house's construction and condition. So I consider it to be cheap and maybe easier, since the wiring needs to go into the walls anyway, to tear down to the old studs and just put up OSB+plasterboard.

Does that sound like a smart idea?
Today, it's wallpaper on particleboard/tretex.

But I'm also wondering what to do with all the old door trim? I don't want to replace it if possible.
Because the walls will become twice as thick as they are now.

The house is from '46.

 

[C.Lundin]

I'm not an expert, but if the house is from '46, the interior walls should at least be covered with tongue and groove boards. In that case, OSB is quite unnecessary. If they are outer walls, they might be vertical planks, I would guess. Remove the surface layer, chase/loosen the electrical wiring in the walls, and plaster over it. If you look more closely, I don't think it fits very well with any moldings today either, so I don't think it will be a major problem.

 

[Timbuktu]

I think they are shiplap interior walls.

But isn't it shiplap-stud+insulation-chipboard-wallpaper?

Or is the chipboard flush against the shiplap?

 

[C.Lundin]

Think they are tongue-and-groove interior walls.

But isn't it tongue-and-groove studs+insulation-chipboard-wallpaper?

Or does the chipboard lay directly against the tongue-and-groove?

I hardly think the walls are insulated. It's likely that you have 70 mm studs with tongue-and-groove boards attached. Outside that, there's probably a wallpapered fiberboard.

However, you'll notice as soon as you start taking them down.

 

[Timbuktu]

Okay, then it's unnecessary with OSB, then you can just put the drywall directly on after you've removed the Tretex. Or is that wrong?

Of course, I notice that, but I'm trying to create a budget of costs before I tear down the entire ground floor.

 

[C.Lundin]

Okay yes, then it's unnecessary with OSB because you can just put the drywall directly after removing the tretex. Or is that wrong?

Of course, I notice but I'm trying to budget the costs before I tear down the entire first floor

It should definitely work. It might be a bit uneven, but it shouldn't be so bad that you can't install drywall directly.

Then I also wonder if you might have calculated a bit incorrectly. 75 square meters of drywall and OSB shouldn't cost more than about 7-8k, with the drywall being only a third of that.

 

[Timbuktu]

Aha okay, but if you were to frame out from the wooden wall and insulate, would it be wrong in such an old house?

75sqm is the floor area. The rest I have calculated with the wall measurements and added some extra, as well as included screws and a little spackle.

 

[C.Lundin]

Aha okay but if one were to install battens from the wooden wall and insulate, would that be wrong in such an old house?

75sqm is the floor area. I have calculated the rest with the measurements of the walls and added a bit, as well as included screws and some filler

If we're still talking about the interior walls, it doesn't affect anything, but I would rather open one side and insulate between the boards and then put OSB+gypsum on one side instead.

Ok, that explains it.

 

[pathal]

Tear down. In hindsight, you'll find it nice with everything new. Replace doors and frames as well. Dull expense now. Pays off in the long run, both economically and for the personal feeling.