Have started tearing up the floor and some other things in the children's bedroom. There are old boards in various formats there from a long time ago. Is it tretex or some porous wood fiber board? I want to double check that it's not some old potential asbestos material before I get into it. Thanks in advance for nice replies despite my ignorance. I'm learning!
Looks like tretex.
Treetex is a porous wood fiberboard: https://sv.wikipedia.org/wiki/TreetexByggareJBob said: