Do I have a screw loose?

You have a good point there. People will tell me, before an inspection, that a house or cabin has a great metal roof. Now, I agree, a professionally installed standing seam metal roof can be pretty nice. But so often you get to the site and find something like in the photo....a metal roof with a zillion screws and half of them have worked out or the seal under the screw is rotted away. These just should not be on houses....barns maybe. A better place is sheds for animals. In fact, I have quite a bit of experience with such roofs, as my rabbit and duck houses both use them. And they are great for that. The animals like them and the ducks do not mind a bit of moisture. Not all metal roofs are created equal!

Steve