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Abstract:	Die Anforderungen an das energiesparende Bauen sind mit der Einführung der Energieeinsparverordnung (EnEV) 2009 auch im Industrie- und Gewerbebau deutlich verschärft worden. Einen wesentlichen Beitrag zur Energieeinsparung liefert die Minimierung des Transmissionswärmetransfers. Analysiert man Gebäudehüllen in Metallleichtbauweise stellt man fest, dass eine Erhöhung der Wärmedämmstärke allein noch nicht zielführend ist, zusätzlich sind Wärmebrückeneffekte zu berücksichtigen und deren Einflüsse auf die Wärmetransmission zu reduzieren. Neben der Bedeutung für die Energieeinsparung ist eine wärmetechnisch optimierte Detailausbildung auch erforderlich, um einen ausreichenden Feuchteschutz (Vermeidung von Tauwasser und Schimmelpilz) zu realisieren und so Schäden zu vermeiden. Ein wichtiges Hilfsmittel stellt hierzu der vom Industrieverband für Bausysteme im Metallleichtbau (IFBS) herausgegebene Wärmebrückenatlas der Metall-Sandwichbauweise dar. Principles and solutions of thermal bridge reduction in light metal construction The requirements for energy-saving constructions for industrial and commercial buildings have been tightened by the introduction of the Energy Saving Regulation (EnEV) 2009. A major contribution to energy saving can be made by minimisation of transmission heat transfer. Analysing buildings with lightweight metal envelops leads to the conclusion that increasing the thickness of the heat insulation alone does not lead to the desired results as additionally thermal bridge effects have to be considered and their effects on the heat transmission have to be reduced. In addition to its importance to saving energy a thermotechnically optimised detail design is also essential for realising moisture proof (prevention of condensation water and mould growth) and avoiding damages. The thermal bridge atlas for metal sandwich construction published by the German industry association for lightweight metal construction systems (IFBS) is an important tool for the careful detail design.
Source:	Stahlbau 79 (2010), No. 5
Page/s:	345-355
Language of Publication:	German

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