By 2030 all European residential buildings will have to achieve energy class E and by 2033 class D. The "Case Green" directive ratified by the EU Parliament a month ago provides for it. Legislation that aims to increase the frequency of renovations and reduce energy consumption and greenhouse gas emissions in the building sector.
And in Sardinia, the housing units involved are around 140,000: they are those that fall into the lowest energy class, G.
According to a report by the Centro Studi della Cna Sardegna, only to achieve the first of the two objectives (class E) limited to 15% of the most energy-intensive homes, every year on the island it may be necessary to intervene on about 14,000 homes with a total investment of 7.8 billion in 10 years. A figure to be compared with the "normal" restructuring activity which in the last ten years has involved an outlay of approximately 11.6 billion.
In Sardinia there are 978 thousand housing units of which about 37.5% are over 50 years old: the houses in buildings built before 1920 are instead about 46,700 (4.8% of the total). Of the 978,437 regional homes, over 67% are in energy class G (the lowest).
Not only that: the application of the first phase of the EU directive could also require the installation of 980,000 windows , about 98,000 additional each year. The value of the works activated, considering an average cost, including installation, of 1,250 euros per window and 1,640 euros per entrance door, would then be approximately 1.3 billion euros over ten years.
« A greater pace than that achieved in the last two years with the works of the 110% superbonus, or 16,800 housing units in just over two years (12,572 in 2022 alone) - comment Francesco Porcu and Antonello Mascia, respectively regional secretary of the Cna Sardinia and president of Cna Costruzioni Sardegna - In terms of expected investment, considering the similarities with the type of intervention relating to the superbonus (also in that case the objective was to raise the energy efficiency of buildings by two classes), it can be considered a cost average per intervention of 56 thousand euros (evaluated at constant 2019 values) and reach an overall estimate of 7.8 billion in 10 years, a demanding challenge also for the supply system".
There are over 4,500 workers in the window and door sector in Sardinia, and more than 1,600 companies.
Last year, thanks to the incentives, 307,000 fixtures were installed on the island, over 561,000 in the two-year period 2021-2022.
(Unioneonline/ss)