A bead of caulk was put around the outside of the window opening and the window itself was put in. Once it was shimmed from inside on the bottom and leveled, 2 nails were put in to each of the 2 top corners. The window was then shimmed and leveled on the sides, and the bottom corners received 2 nails as well. At this point, the window was secured from being out of square, and the rest of the nails were put in. Once it was all nailed up, a special aluminum tape was put over the nails on both sides of the window first, and the last strip was put over the top making sure that it extended past the side tape on both sides. And with that—both the windows were done.
How to shingle a roof:
How to shingle a roof (more):