[Eileen]

The chicks are adorable! So glad the maybe sick one is doing better.
I'm in such a different climate, I don't know about the insulation. I bought a roll type but the trusses were spaced differently so DH just went & bought some rigid foam board & put that up for me, nailing it to the trusses so there is a 4-6"? gap between the insulation & the roof. But I'm not dealing with the cold you are. I haven't done anything to the walls yet.
But it sure looks good, really nice sized too!

PS I can't imagine using a circular saw that way but maybe that's just me. DH says you can use it, or a jig saw, or a router. Drill a hole so you have a place to start. He also said are you good with putting in the 2x4 frame for the window?
Have you called where you got the shed from, to mention that they didn't put the extra window in, and maybe they'll come out & do it?