I cut the window and door openings in the new plywood walls of the conservatory. It was quite a workout since I didn't have power tools on hand to use. The foam core rooftop is just for planning purposes. I haven't decided on whether I want a glass (i.e., acrylic sheet) roof or a solid one. I'm rather excited about this room, mainly because it is turning out as I had hoped just like the garage. Both the conservatory and the garage are partial scratch built rooms using the Foxhall Conservatory kit as the basis.