Au, Switzerland, 2025

Green building envelope for wastewater treatment plant

A new building at the Rosenbergsau wastewater treatment plant will feature a sustainable, green facade. At its heart is a trellis structure made of Webnet by Jakob Rope Systems, which provides 390 square meters of support for climbing plants. This creates a living, natural envelope that cools the building and captures CO2.

Initial situation and concept:

The Rosenbergsau wastewater plant in Au is being expanded with an additional building that will house a new treatment stage for wastewater processing. This new stage removes micropollutants from the wastewater of the connected communities, making an important contribution to environmental protection.

With this new building, the operators are sending a clear message in favor of greater sustainability: the structure will feature a green facade and a planted roof, both of which will help improve the CO2 footprint and provide natural cooling.

The vertical greenery will include, among other species, hops, honeysuckle, clematis, field rose, and red- and white-fruited bryony. Covering a total area of around 700 square meters, the vegetation on the roof and facade will make a significant contribution to capturing CO2 and keeping the building cool.

 

 

Planning and implementation:

Jakob Rope Systems was responsible for planning and installing the trellis structures for the green facade. The project uses the stainless steel Webnet system with sleeves, featuring a 2-millimeter rope diameter and a mesh size of 160 millimeters. In total, around 390 square meters of mesh surface were installed. The structure is supported by 270 spacers mounted on the exposed concrete facade.

 

Jakob products and services:

Project partners:

Building owner: Rosenbergsau wastewater treatment plant
Landscape architecture: AFRY Schweiz AG
Trellis structures: Jakob Rope Systems