The core activity of Weiss AG encompasses the provision of services and works in the field of building technology and metal construction. Specifically, this includes: roofing works (e.g. flat roofs, lightning protection, facades, chimney construction and renovation), sanitary works (e.g. new construction, renovation, bathroom construction, bathroom renovation, Geberit, shower, toilet, water softening systems), heating technology (e.g. new construction, renovation, heating system renovation, comfort ventilation systems), metal construction (e.g. metal railings, canopies, metal balconies, metal stairs, glazing), rental of scaffolding and other equipment, and a 24-hour emergency service for heating, sanitary and other building technology systems.