Which board for plastering on an interior stud wall?

[kamrate]

We have an exterior wall, wooden posts with exterior wood paneling. From the outside in, it is wood paneling, 70 mm glass wool, building plastic. The desire is a plastered wall on the inside, which will then be painted white.

I was at Beijer, and their suggested solution is 1000 SEK per m2 in material cost, excluding labor. I think that's unreasonably expensive. They proposed Aquaroc façade board at 400 SEK/m2, fiberglass reinforcement mesh, fiberglass-reinforced plaster at 360 SEK per bag. As I said, I'm not willing to pay for that.

I figure it must be total overkill to build an *outdoor façade* when it's a dining room, indoors. No sink in the room, not a wet room at all.

For example, what is stopping someone from installing Fermacell fiber gypsum board for wet rooms, attaching plaster mesh (metal) to it, and plastering with Plaster C? (I've spoken to the manufacturer, will call another guy there again tomorrow.)
https://www.byggmax.se/skivmaterial/gipsskivor/fibergipsskiva-för-våtrum-m.m.-p07540

I am also aware that I should really have an air gap closest to the exterior wall, but it's a fence to the neighbor and that's not a current possibility. We tape the foil carefully and ensure a vacuum through ventilation instead. As I said, it's not flexible, so just that part is not worth discussing. What I'm wondering about is how to plaster the inside for less than 1000 SEK per meter.

Thanks in advance!

 

[henke_benke]

We have an exterior wall, wooden studs with wooden paneling on the outside. From the outside in, it's wooden paneling, 70 mm of fiberglass wool, and construction plastic. The desire is for a plastered interior wall that will then be painted white.

I was at Beijer, and their proposed solution costs 1000 SEK per m2 in material cost, excluding labor. I find that unreasonably expensive. They suggested an Aquaroc facade board at 400 SEK/m2, fiberglass reinforcement mesh, and fiberglass reinforced plaster mortar at 360 SEK per bag. As I said, I'm not willing to pay for that.

I figure it must be total overkill to build an *exterior facade* when it's a dining room, indoors. No sink in the room, no wet room at all.

What, for example, prevents putting up a Fermacell fiber gypsum board for wet rooms, applying plaster mesh (metal) on it, and plastering with Putsbruk C? (I've spoken with the manufacturer, will call another guy there again tomorrow.)
[link]

I am also aware that I should ideally have an air gap next to the exterior wall, but it is a fence to the neighbor, and it's not a current possibility. We tape the plastic carefully and ensure negative pressure via ventilation instead. As I said, it's not flexible, so that part is not worth discussing; what I'm wondering about is how to plaster the inside for less than 1000 SEK per meter.

Thanks in advance!

gypsum plaster then?
doesn't it achieve the same look?

 

[InsidersUnited]

Agree, use tile adhesive, it adheres to almost any board. Dry. Then polish it. Paint.

 

[kamrate]

I am aware that there is plaster mortar. Should I understand you as saying that it would be okay to use a "regular" drywall for indoor use, use it as a board, and then
- use plaster mortar (henke_benke)
- prime with tile adhesive, then plaster (Martenw)

It would be nice if you could elaborate a bit more on how you envision this and maybe with what background experience you recommend the method. It's not that I mistrust you, but there are many opinions from different sources, difficult to determine who is "right".

 

[SpackelFredrik]

Apply regular plaster, place paper tape in the joints, and then use Dalapro Deco. Deco is a ready-mixed plaster (white-pigmented) and is easy to use.

 

[kamrate]

Use regular gypsum, apply paper tape in the joints, and then use Dalapro Deco. Deco is ready-mixed plaster (white pigmented) and is easy to use.

Yes, it's mainly visually that it should look like plaster, so to speak. It's an order from higher up, i.e., the heart's rose wants it that way, and it's definitely more about visuals than function.

 

[kamrate]

Are there other products that might be suitable for creating a plaster-like surface? I know, for example, that a friend used Casco Husfix, but it's not something I've tried myself. Then there's Weber Gypsum or whatever it's called. Furthermore, there's the McGyver method that this lady used:
https://www.byggahus.se/forum/threads/vaegg-som-ser-ut-som-betong.121331/page-2

 

[Casaloco]

You can install regular plasterboards and then use texture paint or mix in texturing medium, it should give a "stucco-like" finish.

 

[InsidersUnited]

I applied fix on OSB, then regular fine plaster. No cracks, 2 years ago. I'm of average intelligence )