Old white insulation

[KPLind]

We are in the middle of expanding our house from the late 40s.

Today I made a hole in the old outer wall and encountered a white insulation surrounded by black paper.
The insulation is white "fluff" that easily falls apart.

Risk of asbestos?

 

[Casaloco]

We are in the middle of expanding our house from the late 1940s.

Today I made a hole in the old exterior wall and encountered a white insulation enclosed by black paper.
The insulation is white "fluff" that easily falls apart.

Risk of asbestos?

I would guess old mineral wool. It often had black paper back then. No asbestos that I've heard of.

 

[Fotografen]

That looks like old mineral wool. The dust is not particularly healthy, it tends to be dusty as hell.

 

[tergo]

no asbestos but there might possibly be a glass shard in it
gullfiber also manufactured glass wool mats black sewn on the long sides

 

[KPLind]

Thank you for the answers!