[bartman]

In Germany, regulations around asbestos are quite strict: You're not allowed to "seal it in" by e.g. putting floor leveling compounds on top of old asbestos-containing flooring. If there's asbestos found during renovations, it needs to be removed professionally.

When we re-did our kitchen we found asbestos-containing glue under a new-ish layer of tiles one of the previous owners of the apartment just laid on top. I wish regulations would already have been stricter back then (and that they would have been followed - another story...) as this surprise find caused massive delays to the construction and forced us to temporarily move out during the removal and decontamination.

One of the best ways to make DIY-ing in buildings built before 1994 (when asbestos was banned for construction in Germany) safe has been to buy a H-filtration class shop vac. It can filter out asbestos fibers and many other fine dust particles that aren't healthy to inhale and was barely more expensive than a comparably good vac.