Abstract
The Directive 2010/31 UE (EBPD) introduces the Nearly Zero Energy
Buildings linked to cost optimality, where energy benefits are closely linked to
economic benefits. This methodology is applicable both to new and existing
buildings, but although it has been largely applied to existing buildings, there
are only few examples on historic buildings. Contrariwise, it would be
appropriate to develop a specific methodology for the economic valorization of
heritage buildings, considering also the preservation of their historic values.
On the other hand, it could develop shared information and examples of
historic “reference buildings” (i.e. on discount rate, type of proper
methodology between financial or macro-economic schemes). For this reason,
the case studies become an important starting point to create common
typological and repeatable models for applying this methodology. This
research aims at evaluating the economic benefits of energy retrofit of a
traditional historic masonry, using the "Cost Optimality” methodology. The
research is structured into the following parts: (i) assessment of the heritage
value; (ii) definition of the type of masonry; (iii) selection of the insulation
systems; (iv) assessment of the energy benefits related to the insertion of
various insulation materials; (v) evaluation of the Life Cycle Costing; (vi)
evaluation of the optimal insulation performance and cost-effectiveness; and
(vii) comparison of energy consumption and Life Cycle Cost to define the most
appropriate interventions for the historic wall.