Interesting initiative of AIP (Italian Association of Expanded Polystyrene) and the Information Centre on PVC that the draft proposes 2-liter house. All information can be found on the site www.casa2litri.it . Practically it is housing that is definitely performing in class B than the current national building stock. The extensive use of petroleum products (EPS - expanded polystyrene and PVC) does not allow you to aspire to the letter "+" confined to their homes which, in addition to being high performing in terms of energy use (in almost all) of environmentally friendly materials and environmentally friendly ' environment. The high use of polystyrene, in my opinion, was avoided at least in the roof where a wood-fiber insulation (density greater than EPS) would have guaranteed equal isolation, the main benefits of thermal mass and thermal lag. But because it was the combination of polystyrene to promote this initiative, I think a case like that was not even thinkable.
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