When are smoke detectors mandatory
Smoke detectors are mandatory sinds 21 october 2004 in Wallonië.
When remodeling your home after the floods, it is best to think about safety. You are required to install one smoke detector per floor since 2004.
It is best to take devices that can be connected to each other and that have an extra contact with which you can switch off your gas line or heating oil, for example.
Official document of the Belgium gouvernement:
10_1.pdf (fgov.be) (10-11-2004 Staatsblad, Moniteur Belge)