The core activity of Wyss AG is the provision of services in the fields of sheet metal work, roofing, lightning protection and solar systems. Specifically, this includes: Sheet metal work: general sheet metal work on single-family and multi-family homes; Solar systems: installation of thermal solar and photovoltaic systems; Flat roof / Pitched roof: flat and pitched roof work for single-family and multi-family homes, laying of walkways and utility surfaces for terraces; Roof inspections / Fall protection: inspection of roofs and facades for defects and damage, installation of fall protection systems for flat and pitched roofs; Lightning protection: planning, design and installation of lightning protection systems. The company offers these services mainly in the region of Tagelswangen-Lindau, Illnau-Effretikon, Nürensdorf, Weisslingen, Winterthur, Oberembrach and Brütten.