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- The accomplishment of portuguese thermal code exigencies in old housing buildings’ interventionsPublication . Ferreira, Ana Vaz; Silva, J.A. Mendes daThe energetic certification system was implemented in Portugal in 2006, with repercussion after 2008, and motivated by the transposition of European Energy Performance Building Directive (EPBD) from 2002. The system was reviewed in 2013, after the EPBD recast in 2010. The new legislation came up with restrictive parameters in terms of constructive solutions in order to decrease the energetic consume and Greenhouse Gas Emissions (GGE) from built environment. These parameters, such as U-values for example, are presented through reference and maximum values, and is mandatory that the analyzed building present a nominal cooling and heating needs inferior than a reference building. The thermal code is not mandatory for some buildings, considering some specific characteristics, and are an exception to the norm. It is possible not to apply it in the situation when the code compromises traditional buildings in terms of architectural value and/or patrimonial interest. The aim of this work focused on the analysis of some interventions, the existent solutions and the intervention actions, in old buildings where the thermal code was not applied. These data were compared with the thermal code exigencies in order to understand what extra efforts are required in order to accomplish the reference values and its implications in buildings architectural characteristics as well as its impact in patrimonial relevance and value.
- Building's rehabilitation towards sustainable behaviourPublication . Silva, J.A. Mendes da; Ferreira, Ana VazTo achieve a sustainable building’s behaviour and preserve the environmental balance, three laws must be taken into account: (i) the resources’ consume must not be faster than the rate at which nature can restock them, (ii) the creation of systems that consume maximum energy-quality and (iii) the maximization of the use of renewable and recycled materials. Therefore, the buildings’ rehabilitation process must increase, instead of the proliferation of new buildings, in order to provide the sustainability of the built environment and minimize its ecological impact. The sustainable rehabilitation process is even more difficult in historical areas, in general sited in central zones of the urban mesh, with fragile comfort conditions and a rigid structure. In this paper, different evaluation tools for sustainable buildings were analysed in order to provide a set of evaluation criteria to be applied in the rehabilitation process in historical zones.
- Model for and integrates evaluation of rehabilitation actions:an approach to a group of buildings of the beginning of the 20th centuryPublication . Mouraz, Catarina; Silva, J.A. Mendes da; Ferreira, Ana Vaz; Bettencourt, António A.The current challenges of sustainable construction are frequently deemed incompatible or hardly reconcilable with the basic principles of heritage safeguarding and conservation. This issue may gradually be surpassed with a thorough integrated analysis of the rehabilitation solutions and a detailed knowledge of the existing building. This paper presents the application of an exploratory model for an integrated evaluation of rehabilitation actions according to different perspectives, such as local regulatory demands as well as sustainable heritage preservation concerns. The design of this approach was based on a constructive characterization and conservation state analysis of three city blocks located in the Historical Centre of the city of Viseu, in Portugal. The main goal was to create a tool that allows the evaluation of rehabilitation solutions according to different criteria, allowing a holistic comparison of its performance. This will allow technicians and decision-makers to perform more informed judgements, contributing to define a more global and sustainable renovation process.