Estudo de viabilidade econômica do Retrofit predial em edificações antigas: uma ferramenta de auxílio para a tomada de decisão.

Abstract

Entrepreneurs in the construction sector face situations in which the availability of undeveloped land is low or non-existent. In addition, with the constant advent of new technologies, the number of technologically outdated buildings also grows. Thus, those who want to invest in an existing building face two alternatives: to recover and update the building through retrofit, or to demolish and rebuild. The present work aims to elaborate a script of procedures that will aid the decision making between the realization of retrofit or the demolition / reconstruction of old buildings. In order to do so, the steps to be followed throughout the selection process were described as the pre-diagnosis, the diagnosis and the evaluation of the economic viability of retrofit, where, in the last stage a tool was developed by the author and called TVER – Teste de Viabilidade Econômica do Retrofit (Retrofit Economic Viability Test). After presenting its components, it was applied in practical cases of interventions in buildings, testing its accuracy. The results obtained pointed a relatively small variation when considering budgets in buildings that are undergoing renovations, varying from 1.02 to 8.89%. From the work, it was concluded that, despite the inaccuracies found in the tool, it can still be used satisfactorily for the objective that was proposed, as an auxiliary element of the decision making between the building retrofit or the demolition / reconstruction of the building. For a better accuracy, it is suggested the analysis of the method used in a more representative universe to obtain more precise results.