Curtain-type rear-ventilated concrete façade with non-metallic reinforcement

The requirements of modern and sustainable construction demand innovative façade solutions that are resource-efficient, economical and practical to use. In addition to nesseler’s existing carbon sandwich façade, the project is developing another carbon concrete façade that is easy to install, uses cost-effective materials and is highly environmentally friendly, making it ideal for a wide range of installation situations (new builds and renovations). The aim is to identify and further develop relevant façade systems that use carbon concrete – as an umbrella term for concrete with non-metallic reinforcement – as a load-bearing and/or visual element, thereby exploiting the special material properties. This will result in a family of façades that can be used flexibly and individually designed for new buildings and the renovation of existing buildings.

The focus is on developing a robust and easy-to-install façade type that complements the existing sandwich façade and ensures predictability and compliance with current regulations and approvals.  Various systems such as rear-ventilated or bonded façades made of carbon concrete were considered in advance. In terms of feasibility, cost-effectiveness, sustainability, flexibility and design freedom, a system with a curtain-type rear-ventilated concrete façade was identified as the most suitable.  Particular attention is paid to large-format façade elements that enable a joint-free design and are also suitable for prefabrication in a precast concrete plant.

In addition, planning and implementation guidelines for the new façade type are being developed, including standard solutions for corner, parapet and base designs as well as suitable fastening systems. This is supplemented by a comprehensive ecological and economic assessment that takes into account material and labour costs as well as the carbon footprint and installation efficiency.

The project thus pursues a clear practical approach: in addition to technical feasibility and building code compliance, the focus is on creating a sustainable, economically viable and design-flexible façade solution.

The project is being carried out in collaboration with CBI member companies nesseler and Leviat. Scientific support is provided by the Chair and Institute of Structural Concrete at RWTH Aachen University.