Renovation Process Methodology

Abstract

In its first part, this chapter presents theoretical backgrounds of energy flows in buildings which have to be considered for calculations of the energy demand for heating and cooling. In regard to the described theory, the influence of the climate data, the aspect ratio, the building’s shape factor and particularly that of the glazing position and size on the energy behaviour undergoes in-depth analysis. Furthermore, a specific approach for defining an effective building thermal transmittance coefficient is developed to be implementable on new as well as on renovated buildings and to serve designers as a good starting point in their prediction of the building energy behaviour. In the second part of the chapter, separate possible steps of the building energy-efficient renovation are successively presented through a specific description of the consequent reduction of the previously presented energy flows resulting in the total annual energy demand for heating and cooling. A particular focus is laid on the building attic extension by means of a structural timber-glass upgrade module, treated as the most complex renovation approach yet as a highly preferred solution for the energy-efficient renovation in urban areas. The aspects from the energy and structural perspectives are additionally interlinked to obtain a possible optimal solution for building renovation. The findings of the current chapter present a good theoretical background for in-depth analysis of renovation steps and their combinations applied within the energy-efficient renovation implemented on real structures in Chap. 4.