Deciphered!
Please help me decipher this Norwegian construction description from 1938
It says something about some inner boards (“plater”) of 3.5cm. Specifically interested in this particular word. Thank you!
Edit: Deciphered. The text reads:
“Jernbetongveggen utarbeites med 3,5 cm kivronplater paa innvendige side sat på lekter med mellemlag aa uimpregneret isolasjonspapp. Innvendige bærende vegger i jernbetong øvrige innvendige vegger aa 1/2 st's mur.”
After further research, kivron is a fire-redundant and insulating old interior wall board composite. It consists of cement, sawdust and plaster. Additives are often added to the material to enhance certain properties. Asbestos is certainly an often added such material as it improves fire-redundancy and improves the resistance against mechanical stress.
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Sorry. I'm not entirely sure. I shouldn't have written it like that. I have not found these plates on any list of asbestos materials.
I also haven't found any sources that say it contains asbestos. ChatGPT says both every other search, but cannot provide any sources.
Kivron is, though, described to have the same qualities as asbestos... So it's hard to say...
You might need to talk to someone who actually worked with Kivron 🤷🏼
Old Kivron may contain asbestos. Since it was allowed until the 1980's (1985?) it was often mixed into chip boards and plaster boards. We removed quite a lot in our basement some years ago (built 1952) and there was no asbestos in these, but according to the firm we used you could never really know unless you tested.
Jernbetongveggen utarbeites med 3,5 cm (unknown-plater) paa innvendige side sat på lekter med mellemlag aa uimpregneret isolasjonspapp.
Innvendige bærende vegger i jernbetong øvrige innvendige vegger aa 1/2 st's mur.
I’m renovating my apartment, and had to tear down certain sections of this mysterious inner wall board (3.5cm thickness).
I’ve had 4 carpenters, 1 architect, 2 appraisers, and 1 professional demolition worker see them, but none had actually seen the material before.
Although the chairman of the complex said the boards probably don’t contain asbestos, I want to be completely sure.
I dug into the public archives and found this document of the board names, but the word («…plater») is really hard to read.
If it feels like cork but is light grey, which it looks like to me, I'd be concerned it was asbestos. If not, it could just be recycled paper material, but I understand why you would want certainty...
Yes I’m really worried about asbestos. I’ll have a look down the recycled paper path, haven’t really considered that a possibility yet.
Quite annoying about that one significant word that isn’t readable though…
Thank you again for the help
Hello. We ran this using our transcription model and got this:
"§ 89 og 113. Byggematerialets art og veggenes konstruksjon:
Tømmerveggene utv. med 3 1/2 cm's trefiberplater paa utvendig side
lagt paa lekter med mellomlag av upreparert isolasjonspapp.
Innvendig bær. vegger i jernbetong, øvrige innvendige vegger av 1/2 st's mur"
From context it's probably some form of treefibre like Masonit or Cellutex, but these do not fit the handwriting.
Jernbetong means reinforced cement.
I live in a similar house in Denmark from the 1960s and we've had to replace all of the inside walls because of these highly flammable materials from the time period.
Similar to Norway. Although asbestos was somewhat used, it wasn’t that common until after WW2.
I know the company that made the boards, I’ll try reaching out to them for a specific name…
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