Energy from the façade
Office building with PV façade on secure fischer substructure
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- 26-06-22-Flex-Neubau-Steinheim
This resulted in a durable, safe, and energy-optimised PV façade – without compromises in load-bearing capacity and aesthetics.
The building measures 44.85 m × 17.78 m × 14.68 m and was constructed using reinforced concrete. For Flex Elektrowerkzeuge GmbH as the client, the focus was on a building envelope that convinces both visually and energetically. The PV system is not just mounted on the building but fully integrated as building-integrated photovoltaics into the ventilated curtain wall façade (VCF) – making it an integral part of the sustainable energy concept.
The planners addressed the requirements for design, function, thermal insulation, and especially fire protection (building class 4, flame-retardant) in an aesthetically appealing and economically efficient way. Two trades worked closely together in the implementation: the solar installer ELDI Solar GmbH from Stuttgart and the façade specialist Metallbauer Reinhardt GmbH from Bad Rappenau. The result is an office building whose façade combines aesthetics, safety, and economical, sustainable power generation.
Glass-glass solar modules of the type Solarwatt vision GM 3.0 construct were used, mounted via fischer façade systems. The basis of the solar façade substructure consisted of angle-shaped L-wall brackets FLH R made of stainless steel, part of the vertical support system ATK 100. These brackets score with very good building physics properties and anchor the construction with minimal thermal bridging in the reinforced concrete façade using fischer fasteners.
In the further construction, the system was supplemented by T-profiles as well as the ATK 103 P20 support structures, which, in combination with the vertical substructure, ensure secure load transfer. The photovoltaic façade mounting of the modules themselves was carried out using the clamp system. Since the geometries of the clamps and ATK-103-P20 profiles are precisely matched, the PV modules could be hung quickly, securely, and in compliance with standards. For optimised load distribution, vertical hat profiles ATK 103 V were additionally used, allowing the modules to be directly hung into the horizontal support system.
The installation-friendly substructure meets the low energy standard and, together with the Solarwatt vision GM 3.0 construct glass-glass modules, forms a tested and approved system solution. The use of the stainless steel brackets FLH R minimised thermal bridges and maximised the energy efficiency of the entire building envelope.
“In addition to the perfectly coordinated system solution for the PV façade of the new office building of Flex Elektrowerkzeuge GmbH, we offered comprehensive technical support including joint consultation and collaboration with the module manufacturer to optimally meet static, structural, and design requirements,” emphasises Mirco Kurth, Technical Field Service, Project Development, Architect Service Domestic at fischer BWM Facade Systems.
