Si tratta di un rivestimento metallico che potrebbe essere alluminio oppure in lamiera preverniciata... credo alluminio con il quale hanno anche rivestito le pareti. Bye!!!

I would love to help, but my Italian is non-existent and Google translate is not working so well. I believe you are asking about the roofing - it is a Kynar pre-finished, flat panel 24ga standing seam metal roof with 12" o.c. ribbing. If this is not your question, please respond in English I will do my best to answer it.