Constructing curtains

Sometimes I’ll hole up in a garage or a public building without curtains, and I would like to be able to add them, perhaps by using a blanket and some spikes?
Mainly I like to be able to open them during the day so I can read or sew by the window.

Just go up to a window that doesn’t currently have curtains and use the “construct window” task from the construction menu on it. Assuming you have the proper supplies you will upgrade the window from a curtainless always-closed on into a domestic window that can be opened/closed and has curtains.

Wow that is good to know all those years irremediably taping windows are finally over!