House 1900 artistic slate asbestos?

Hello, we would like to buy a property from around 1900. Overall, it seems to be in relatively good condition. The roof is covered with artificial slate. Was that already asbestos back then? I have heard that the heyday of asbestos was probably later, but was it already present in artificial slate at that time?
In addition, there is a barn with [Eternitplatten]. That was definitely asbestos back then, wasn't it?
It shouldn’t really be in the facade anymore.
I know that to be certain, [Inches] need to have it tested, but are there still initial assessments?

The roof is not from 1900.
Probably done sometime in the 60s-70s, then the likelihood that the sheets contain asbestos is high.
If newer than around 1980, rather low.
It can only be determined for sure by testing in a lab, which does not cost a fortune.
Does the roof definitely need to be replaced? Disposal is not cheap, but unproblematic. It can be done with a few thousand.

Connect me to Apokolok: Artificial slate is one of the building materials with the highest likelihood of containing asbestos at all. This only lessened after the mid-80s. Some manufacturers also labeled their artificial slate during the transition period, provided it was asbestos-free. Remaining stocks were still installed even towards the end of the 80s.