Currently renovating a house built around 1900. Brick with wooden joists.
The ceiling is cloison, i.e., plaster reed mat sparse paneling.
Between the beams, it's filled with a very light, white fine granulate. Can be crumbled with fingers and it chalks a bit.
It's so light that it floats. Does not burn.
We don't know when the filling was added but can't see any signs the joist layer has been previously opened. Found no holes or similar.
Initially thought quartz sand—but it's too light.
Perlite—too fine grains.
Does anyone have any idea?
The ceiling is cloison, i.e., plaster reed mat sparse paneling.
Between the beams, it's filled with a very light, white fine granulate. Can be crumbled with fingers and it chalks a bit.
It's so light that it floats. Does not burn.
We don't know when the filling was added but can't see any signs the joist layer has been previously opened. Found no holes or similar.
Initially thought quartz sand—but it's too light.
Perlite—too fine grains.
Does anyone have any idea?
