Auswirkungen des in der EnEV 2009 nun auch für Wohngebäude geforderten Nachweises des sommerlichen Wärmeschutzes nach DIN 4108-2 auf die Notwendigkeit bauseitig bereit zu stellender Verschattungssysteme

Consequences of the required assessment of thermal insulation in summer for residential buildings according to the German EnEV 2009 and DIN 4108-2 to the need of shading systems to be provided by building owners.

Effects of the new requirement in EnEV (German Energy Saving Ordinance) 2009 for residential buildings to show evidence of conformity as regards thermal protection in summer according to DIN 4108-2 on the necessity to provide shading systems. Evidence of conformity as regards thermal protection in buildings in summer, which has been required by law for non-residential buildings since the EnEV was introduced in 2002, is specified in DIN 4108-2. EnEV 2009 extends this requirement to new residential buildings.
At present, the overwhelming majority of residential buildings in Germany are constructed without shading systems; it is up to the building users themselves to retrofit these if necessary. This paper examines whether changes are to be expected as a result of EnEV 2009.
For this, an apartment in a block with a floor plan and façade layout typical of today is assessed and analysed according to DIN 4108-2 [3] with the PRIMERO-Sommer EDP program by way of example.
The result shows that the rooms as they are to begin with do not all fulfil the requirements and that the building owner must therefore adopt additional measures to provide thermal protection in summer (solar control glazing, shading, and smaller windows). The measures are examined individually, and effective combinations are developed and suggested for implementation in practice.