Walls: solid wood, plywood, or OSB under the gypsum?

[Prosit]

I am a bit concerned about emissions (formaldehyde and other unpleasant substances) from the wood-based materials one might consider using under the drywall inside the house.

1. Both plywood and OSB release more than solid wood, right?

2. Are modern plywood/OSB low-emitting enough that it’s not worth worrying about it—considering the health aspect when living in the house?

3. Are there drawbacks to using tongue and groove under the drywall—I read somewhere that the tongue and groove might move somewhat (shrink?), causing the screws holding the drywall to shift and make visible marks.

I would like my building to be as healthy as possible to be in...

 

[Enk Projektet]

Can you have a cast then??

 

[Prosit]

Plasterboard closest to the rooms, something wood-based that you can screw and nail into underneath.

Tongue and groove boards seem good according to other sources, and apparently, it should be cheaper - if you do it yourself, that is.

 

[Herr Anders]

OSB and plyfa emit significantly less than particle boards. And particle boards are below the limits for what can be used indoors. Thus, I don't think you need to worry about health aspects.

However, there are a few other details worth considering. For example, råspont is thicker than boards. If you have 100 meters of walls in your house (which a typical villa usually has), you lose 1 sqm of floor space by having råspont instead of wooden boards behind the plaster. And you lose an additional 1 sqm by having wooden boards compared to having nothing at all.