The core activity of baulüften.ch consists of providing services in the field of construction site safety and surveillance, particularly through: * Dehumidification: Regular dehumidification measures on construction sites to prevent moisture damage and enable construction progress. * Surveillance: Presence on construction sites to identify and deter unauthorized persons. * Securing: Ensuring that construction sites are properly secured in the evening to prevent unauthorized access. The company offers these services to protect construction sites, minimize the risk of construction damage, and enable construction progress.