After mounting the window the fiberglass is wrapped around the "nose" of the Class C rv.
All of this wood was completely rotted. So a little thought and a lot of "cut to fit" was used to allow the fiberglass to curve around the nose. Cypress was used to help prevent rot in the event of a leak.
Be sure to use an odd number of profile curves. You want to have one in the center. When you start to bend the
Once again a layer of black butyl putty tape is used where the fiberglass seams join.