More home hunting

Whilst looking around St Helena last week I saw the house pictured above. It is a decent house in a very nice town and seems to have plenty of scope for the type of work I like to do (major rebuild/renovation). There is nothing special about the house except (for me anyway)the galvanised or zinc roof.Outside of commercial applications I have not really seen this type of roof used on a domestic building or at least one of period appearance. Does anybody have any experience of these materials? I'd be interested to know how they work as I want to try new products,styles and materials when I buy my new house. I'm not looking to buy a house with such close neighbours like the one shown but I don't mind if the roof is made of what is to a brick and stone man such as myself an exotic material!