The core activity of Fornay Frères SNC encompasses two main areas:
1. **Plumbing and Heating Technology**: The company offers services in the areas of installation, maintenance, repair, and renovation of sanitary facilities and heating systems. This also includes emergency services (dépannage) and descaling of heating systems.
2. **Metal Construction and Locksmithing**: Fornay Frères SNC also provides services in the field of metal construction, including the manufacture and installation of metal structures, gates, doors, and other metal parts. This also includes the installation and maintenance of automatic gates and sectional doors, as well as the manufacture of access systems.