Building typologies of public residential building and durability of materials and components. Research on 12.500 residential flats of E.P.E.R. of Potenza

The E.P.E.R. (Provincial Bureau for Residential Building of Province of Potenza) realized, during the last ‘90s, a 12.500 flat real estate. This forms an homogeneous stock, which was analyzed according to the diagnostic method worked out by CIB W86 Building Pathology Board. It was noticed five phases in realization, characterized by building typologies differing in dimension, distribution, materials and building systems. For each phase all buildings were studied considering aging state, quality performance, functional defects or anomalies, decay situations and more frequent pathologies, and it were defined causes and possible solutions thanks to the analysis of single cases and diagnosis of the decay process. In this way it was found out an exact correlation between building typologies and durability, characterizing the recurring defects for each building typology, linking the anomalies to causes of bad functioning and defects in building, to defects in designing and techniques of realization or in the maintenance actions. This study makes it possible the realization of projects of maintenance and/or validated retrofitting interventions that could avoid the repetition of errors made in the past, setting new and more precise “rules of art”.