It looks like we have gray boards 110X110cm (about 3 mm thick) in the ceiling of the basement in the house.
It looks like there's a few mm of plaster and paint and then a gray board that's nailed up, and behind that, there's maybe 20 mm of plaster again. The house was built in the 1920s but has been renovated in stages, including a major renovation in the 60s.
Can I tear this down in the ceiling? Are these asbestos boards? Is it common to have 20 mm of plaster in the ceiling?

It looks like there's a few mm of plaster and paint and then a gray board that's nailed up, and behind that, there's maybe 20 mm of plaster again. The house was built in the 1920s but has been renovated in stages, including a major renovation in the 60s.
Can I tear this down in the ceiling? Are these asbestos boards? Is it common to have 20 mm of plaster in the ceiling?
Hobby electrician
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Nothing in the picture looks like eternit to my eyes at least, paint, plaster, and some kind of masonry block. Boards 110*110 could be eternit.
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The dark gray, perfectly straight board turns out to be a fiber cement board 110X110... 
Just leave it as it is.
Thanks for the response anyway!
Just leave it as it is.
Thanks for the response anyway!
I haven't sent it for testing. Had a construction buddy over who said it is most likely eternit.
The dark gray board is about 3-5 mm thick, rock hard, and 110x110. It's plastered over half of the ceiling which was previously a garage but was converted into a workshop, no boiler room though. It seems illogical to put it up there and only on half the ceiling, the rest of the ceiling appears to have a thick layer of plaster resulting in a height difference in the different parts. It could be that such boards are also under the thick plaster...
...exciting...
The dark gray board is about 3-5 mm thick, rock hard, and 110x110. It's plastered over half of the ceiling which was previously a garage but was converted into a workshop, no boiler room though. It seems illogical to put it up there and only on half the ceiling, the rest of the ceiling appears to have a thick layer of plaster resulting in a height difference in the different parts. It could be that such boards are also under the thick plaster...
it looks like eternit but just from the pictures, I probably wouldn't be able to distinguish it from some minterit-like sheet.
The fact that it is on the ceiling of the garage/workshop also suggests that it is eternit because it was commonly used as fire protection.
The fact that it is on the ceiling of the garage/workshop also suggests that it is eternit because it was commonly used as fire protection.
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