I have a colonial built in 1913 and I live in NYS. My roof was just completed today and I have exposed nails across the entire roof! ![image of roof nails][1] It was not like this before. When I asked the contractor about it, he said this is normal, but I'm having a difficult time accepting this answer. I have included a picture to show what the entire roof looks like from the inside of the attic. [1]: https://i.sstatic.net/OmLnd.jpg