What is this panel material?

[elloffo]

Hello,

What kind of board material could this be? It is quite soft and is on the outer walls in the closet/attic space in a house built in 1927, but renovated in 1980.

Is it treetex? Can one put gypsum on it or maybe apply filler directly?

Thanks in advance!

 

[jonaserik]

Tretex is not good to use for spackling, it's too dry, and the spackle falls off. However, if you can find the studs, then use gypsum, preferably 13mm. With rotgips 6 mm, it can create dents.

 

[-RB-]

Yes, it looks like Tretex. You can certainly put plasterboard directly on it, but I think Tretex can have quite a smell, and I would probably remove it first.
Plastering directly on it was done in the past. But it tends to crack.

 

[elloffo]

Not actually thought about the smell, isn't tretex just pressed wood material?

Yes, it looks like Tretex. Sure, you can put plaster directly on it, but I think Tretex can smell quite a bit and I'd probably remove it first myself. Plastering directly on it was done in the past. But it might crack.

 

[-RB-]

Well. Maybe I'm just sensitive
I tore out a part from our attic and the old slightly musty smell disappeared immediately. So I got the idea that it was the tretex that smelled.

 

[cpalm]

If you tear it away, you should keep in mind that it is a material with good insulating properties. Now the boards aren't that thick, but they do make a little difference.

 

[andersda]

Paint with a cheap color first, then you can fill in later.

 

[unglue]

Have tested both spackling and renovation plasterboard on treetex. Renovation plasterboard is convenient if it doesn't matter if it adds 6mm, but it complicates things around potential moldings and similar otherwise.

I have also applied broad spackling after painting first, and no cracks (so far at least).

 

[Destrier]

Treetex contains a lot of formaldehyde and emits more and more with age - hence the pungent smell.
-I tore everything out
https://www.aftonbladet.se/nyheter/a/4doAk9/giftig-gas-lacker-ut-i-alla-svenska-hem

 

[useless]

Treetex does not contain formaldehyde. It's hard chipboard that does.