With daytime temperatures in the single digits (F), I was motivated to cover the smallest, yet still considerably large, living room window with a thick quilt I had lying around. I just slung it over the curtain rod and then snapped on three of the handy pvc clips that hold the plastic to our hoop house. Then I tucked it in on all sides. It’s not what you could call sealed, but an improvement nevertheless. Amie likes it so much she wants to keep it on during the day, and I don’t mind because it still lets a lot of light through.
I’m hoping to find a couple of quilts that will cover the large bay window in the living room (to be removed during the day), and one small one for the bathroom window, where I will have to use a tension rod. All the little bits help.