Abstract
A considerable part of recent EU policies is currently addressed at developing effective measures to support the transition towards a low carbon society according to the principles and goals of Roadmap to 2050. In this general framework the links between the development of low-emission strategies and climate-resilient approaches to buildings play a key role. As most part of the existing building stock was built before the 1980s, retrofit and renovation actions are widely investigated. Despite progress in this field, relatively little attention has been given to the connections between the achievable energy savings and the energy investment needed to pursue the renovation process and to how technological choices can impact on the energy balance according to a multi-criteria perspective. The paper will explore how different technologies and design solutions to building envelopes cladding contribute to the reduction of the heat gains in urban environments and how appropriate adaptive strategies can further mitigate against accelerated greenhouse emissions. It will discuss the relationship between individual building performance and consequent effect on external environment. The effects of technological and material choices are evaluated for some design scenarios and conditions in order to develop an indicative impact mode.
Highlights
A considerable proportion of European Union (EU) policies in recent years is focused on addressing and supporting effective strategies in response to the long term challenges of climate change and resource constraints which involve and will involve the built environment much more in the future as Directive2012/27/EU and Sustainable Development Commission (2010)
In order to meet the energy demand and carbon reduction target envisaged by EU Directives, intensive and strategic renovation and retrofit actions are required to support the transition of the built environment to low carbon according to the principles and goals of Roadmap to 2050
In addition there have been a wide range of policies and measures to support the transition at an urban scale [5], but relatively little attention has been given to the connections between the achievable energy savings and the energy investment needed to pursue the renovation process and to how technological choices can impact on the energy balance according to a multi-criteria perspective
Summary
A considerable proportion of European Union (EU) policies in recent years is focused on addressing and supporting effective strategies in response to the long term challenges of climate change and resource constraints which involve and will involve the built environment much more in the future as Directive2012/27/EU and Sustainable Development Commission (2010). If the housing stock built during the 1980s and the 1990s is considered, around 80% of the total housing stock is totally or partially inadequate in meeting the current standards in terms of thermal behaviour, energy efficiency, quality and comfort [3] (It has to be noted the considered studies provide a picture of the building stock at EU level, at construction time, there were remarkable differences in Europe especially for what concerns the Eastern European Countries and the former Communist bloc nations) For these reasons, the study will focus on residential buildings and will not include non-residential buildings whose energy demand is quite different and requires contrasting approaches. In addition there have been a wide range of policies and measures to support the transition at an urban scale [5], but relatively little attention has been given to the connections between the achievable energy savings and the energy investment needed to pursue the renovation process and to how technological choices can impact on the energy balance according to a multi-criteria perspective
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