Hello!

I live in an apartment building that was built in 1942. What do you think these window sills are made of?

Close-up of a textured windowsill, gray with speckled patterns, possibly stone or fiber cement. The surface is slightly worn and has a natural look.

Close-up view of a textured, gray surface that could be stone or similar material, part of window sills in a 1942 apartment building.

Close-up of a gray windowsill with a textured stone-like surface, possibly resembling concrete or asbestos cement.

Close-up of a windowsill edge showing a rough texture with a small chip, possibly indicating the material could be stone-like or resembling asbestos cement.

Close-up of a windowsill underside showing a textured surface possibly made of stone or asbestos cement, with a visible notch along the edge.

Could it be some form of stone? Or could it possibly be asbestos cement? I know that you can only determine if a material contains asbestos by sending a piece for analysis, but what do you think? Are there, for example, any similarities between my window sills and the asbestos cement sills in the following thread?: https://www.byggahus.se/forum/threads/vad-aer-detta-foer-material-hjaelp-mig-faststaella.233725/

Best regards,
Ellington
 
Staffans2000
It sure looks like it's cast. At least if you look at the underside. The question is, why are you wondering?

Staffan
 
It is likely asbestos cement. Don't cut into it.
 
It depends on how you define stone. Asbestos and concrete can probably be defined as stone. But it's not unlikely that they believe it is natural stone.
 
Staffans2000 Staffan2000 said:
It looks as if it is cast. At least if you look at the underside. The question is why you are wondering?

Staffan
The reason I'm wondering is mainly because they are a bit worn here and there, and it would feel more reassuring to have slightly worn stone benches than slightly worn eternit benches (not that I think I will die from having slightly worn eternit benches, but simply because it would feel more reassuring if they were made of stone).

My housing company claims that they are stone benches, but I myself think it looks more like eternit benches, not least because of the structure on their undersides. Does a housing company have a reason to lie about such a thing? Or maybe they don't know and are making a confident guess?
 
D Daniel 109 said:
It depends on how you define stone. Asbestos and concrete could probably be defined as stone. But it's not unlikely that they think it's natural stone.
True! But they were clear that the benches did not contain asbestos.
 
I wouldn't trust that.
 
D Daniel 109 said:
I would not trust that.
Neither would I! I have no intention of cutting them in any way, although it would have been a bit fun to chop off a little piece and send it for analysis.
 
I know that our window sills are made of eternit, but I'm not worried about it at all. Not planning to saw into them. Judging by the pictures, yours might also be eternit.

Here's what our window sills look like:

Close-up of a black window sill, potentially made of Eternit, with a white radiator visible underneath.
Close-up of a windowsill that appears to be made of fiber cement board, showing its texture and edge detail.
 
Marlen Eskilsson Marlen Eskilsson said:
I know that our windowsills are made of eternit, but I'm not worried about it at all. I'm not planning to saw them. Judging by the pictures, yours might also be eternit.

Here's what our windowsills look like:

[image]
[image]
Exciting! Thanks for the pictures. Yes, there are definitely similarities.
 
Marlen Eskilsson Marlen Eskilsson said:
I know that our windowsills are made of eternit, but I'm not worried about it at all. I don't plan on cutting into them. Judging from the pictures, yours might also be eternit.

This is what our windowsills look like:

[image]
[image]
Do you live in a rental apartment by the way? I would like to paint my benches, but the housing company says that I would have to bear the cost of removing the paint when I choose to move out of this apartment.
 
No, villa. Ours are not painted except by mistake a little on the underside.
 
Marlen Eskilsson Marlen Eskilsson said:
No, villa. Ours are not painted except by accident a little on the underside.
Aha, okay!
 
Had similar benches in the house.
When we were going to replace the windowsills during the window replacement, I saw a sticker on the underside where the manufacturer's name was written.
Svenska eternit in Lomma.
So I assumed there was asbestos in the benches.
They were also much heavier than one would imagine considering their size.
 
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