An example of good durability of building systems: survey on 303 flats built in Alvanite District at Atripalda (Avellino, Italy), made in coffrage tunnel and precast sandwich panels for façades

The survey presents a study on a public residential intervention, realized after the destroying earthquake of 1980 (between 1983 and 1991) using industrialized building systems (reinforced concrete structure cast in situ in coffrage tunnel and precast sandwich panels for façades). During construction, before the dwellings were accomplished, it were found humidity problems related with water penetration from facades and moisture condensation, and therefore were introduced many upgrade in design and in quality of constructional details, as an external insulation. The result today is a conservational state many times better than similar and co-eval buildings - evidence that durability is the result of very critical factors, design and building stage. In the report are showed results of this study, and is highlighted how some inhabitability problems existing in dwelling. They are related too, to design faults in passive ventilation of the rooms, related to the particular climatic conditions.