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For this reason, directives and laws, which
act in the framework of the existing buildings energy refurbishment, have to face
this challenge with specific care related to the energy retrofit solutions.
The existing building stock is different not
only in each Member State but also in regions of the same country; moreover, we
can find old low efficiency buildings with no historical, but also situations
when they have to be preserved.
German
apartment block. (Source: “Refurbishment for the energy
efficiency of historic buildings in member states in the Baltic Sea Region”)
Different scenarios to face need the
development of diversified approaches for the improvement of the energy performance
of existing buildings; these approaches must involve technical and
economical/financial issues to be effective.
Today new buildings stock REIT (real estate
investment trust) is very modest but at the same time a big market is
potentially available for energy renovation of buildings: tax reductions and
fiscal bonus can highly stimulate this market, as proved by same positive
experiences in EU countries.
Polish historical building.
Nevertheless, energy targets must be fixed
with care. Energy consumption reduction from 250 kWh/m²y (typical of an
existing building) to less than 30 kWh/m²y (towards nZEB),
ensuring at the same time cost optimality, is a very ambitious goal in existing
buildings. Moreover, it is not always feasible due to technological issues and real
estate criticalities.
It is now important to define energy policies
aimed at outlining minimum energy performance goals specifically addressed to
existing buildings considering different types, design features and
architectural value.
If on the one hand we should acknowledge
legislative and prescriptive effort, aiming to raise existing building
performances awareness, on the other hand we can feel a lack of laws and standards
considering existing buildings as a peculiar target.
I truly believe Rehva
community should take the lead of these necessities in order to encourage a
specific and conscious development of building energy renovation.
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