OK, total ignorance here as I'd never heard of a window quilt before. Is it the same as a bed quilt and you hang it up like a regular curtain? Like these:
12 Instructions with Free Patterns to Make Window Quilt | Guide Patterns How do you fix it in place? If it's in one piece can you roll it up if you want to let light in? (I'm guessing they would make the room totally dark, so you'd be spending more on lighting, but it would probably be a great idea anyway.)
We have the opposite problem here of keeping heat out rather than cold, but I'm wondering if this would work for me. How long does it take you to make one? If I've got a big window could I just fix a bed quilt in place somehow? Do you use the same kind of internal layer as for a bed quilt? Would that be bamboo? You've got me thinking, thinking, thinking, as our hot weather will be here soon.