ABSTRACT
The ID of existing buildings is even more complicated due to the restrictions imposed by the existent building conditions. The sustainable retrofitting solutions should be adapted to the initial conditions of structures and adjust them in order to fulfill the updated regulations and requirements (Ungureanu et al., 2012). As a consequence, the modern design regulations for structural and thermal retrofitting of buildings integrate new concepts in the evaluation and design of buildings: design performance objectives, acceptance criteria linked to performance level, sustainability issues and analytical techniques for performance assessment. The rating systems (LEEDS, BREAM, SBTOOL etc.) could offer a measure of building performance both prior and post-retrofitting. However in case of existent buildings an ID solution should integrate both structural and thermal resistance aspects. It is obvious that independent interventions are deficient. An integrated retrofitting solution should be based on the following basic criteria
A. Ciutina, V. Ungureanu, D. Dubina & D. Grecea Politehnica University of Timiúoara, Romania
ABSTRACT: In an integrated design strategy, the retrofitting process is based on a multicriteria analysis, assessing all the issues that may interfere. In case of thermal rehabilitation of existing buildings at least the technical, structural and economical aspects should be considered in a sustainable assessment. In consequence, a global methodology could be conceived following the basic steps for construction: evaluation – design – construction. The sustainability should be considered as an additional parameter in the design and constructional phase. The paper presents several solutions for thermal retrofitting of existing concrete residential buildings. The retrofitting choice will be discussed according to three decisional solutions: (i) single indicator solution, (ii) multi-axial representation and (iii) the characterization factor method.
