This was a fun and simple project. Some 2x4 framing, new windows, and some basic low-cost cedar fence board. Framed the window slots in and fastened the framing to the metal structure. The height was just right so that it sat right on the deck rail. After framing the window slots, I installed the windows and then used the cedar board as siding. This was another low-budget addition where the client just wanted to keep wind and rain from pouring in and still have some visibility.