Originally Posted by
Warren Alderman
Nails through the flashing are wrong in any world we live in, correct?
Also, is it required for the ends of the flashing to be sealed or is it just a "nice thang to do"?
I don't think you will find it a requirement, but it is a nice thing as you say to do. Keep in mind unless it is a soldered seam they will seal it with a sealant from a tube and that will wear out in a few years.
Under the step flashing you should have a "pan" that runs the length so any water the seeps behind the flashing should flow into or onto that pan.