Currently renovating a 70s house, where the walls, ceiling, and floor consist of rough-hewn wood. The walls were covered with Tretex boards, behind the rough-hewn wood there's some kind of "paper" and the ceiling had tensioned fabric and the floor laminate. What "concerns me" is the color difference on the wall's rough-hewn wood compared to the floor and ceiling. The wall is grayish in color while the floor and ceiling look like new rough-hewn wood. What does mold look like on rough-hewn wood, is there a risk that the wall is not in good condition, considering all the risky constructions and such that were done in the 70s? Hard to see in these pictures perhaps, but it is very clear "live." ........Why has just the wall become discolored, any kind soul who has any thoughts on this?? Wooden wall and floor panels from a 1970s house renovation, showing a grayish discoloration on the wall compared to the new-looking wood floor. Wood-paneled room with grayish walls, contrasting with the ceiling and floor. A ladder and trash bag in the foreground beneath a hanging light.
Kind regards, Thomas
 
It's simply that the wall panel has been treated with something.

Perhaps to prevent mold or pests :)
 
Can't imagine there's anything wrong, it's probably as KnockOnWood writes. For some reason, the wall is treated with something. Maybe they initially intended to leave it visible? Or perhaps they found some leftover stock?
 
Is it not that there are remnants of concrete?
They might have used råsponten when they formed the basement if you have any.
 
I actually have a cast arch as an intermediate floor, I hope your guess is the right one klev would save me a lot of headaches.......
 
I mean Oleg.......
 
If you scrape with a knife, it should remove some of the mortar that's left.
 
Took down the råspont to investigate and the wall feels healthy, so you were probably right, Oleg. Thanks for all the quick responses.........
 
Having a hard time seeing it being possible to tear down a stamped råspont for arch casting and then tear it down completely and reuse it

Looks more like it is painted as mentioned earlier
 
hmm you even do that when forming and casting today.
so I see that as entirely possible
 
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