In their essay entitled, “Domestic Italy After WWII: Collecting Stories from Middle-Class Houses” published in Candide. Journal of Archtiectural Knowledge in 2015, Gaia Caramellino and Filippo De Pieri address a series of methodological challenges raised by the inquiry on ordinary residential environment and the diverse forms of communicating and transferring knowledge between the different cultures of the communities of practices engaged in its production. The essay questions the research practices, methods and sources mobilized in the study of the processes of codification of tacit forms of knowledge embedded in diverse communities of practice and rarely documented by the canonic accounts of post-WWII Italian built environment.