The core activity of brennwald+heilig AG encompasses three main areas:
1. **Sanitary**: The company offers services in the sanitary sector, including renovations, repairs, maintenance services, shower and toilet fixtures, as well as the creation of barrier-free bathrooms.
2. **Sheet Metal Work**: In the sheet metal work sector, the company provides sheet metal services, including the treatment of flat roofs, terraces, pitched roofs, Triflex liquid plastic sealings, lightning protection systems, metal facades, and roof maintenance.
3. **Solar Energy**: The company also offers services in the solar energy sector, including maintenance contracts.
In addition, the company is a training organization and offers apprenticeships in the sheet metal work and sanitary sectors.