Interior storm windows/panels
(Hope I didn't miss a thread on this--did a search and found little.)
I really need to do something about my 1790 house's windows this fall. Exterior storms are not desirable to us, or permitted in our hist. district. So--I'd like to do what I've seen at some museum houses, and that is to use interior storms.
Does anyone have them, and could describe them to me? I'm thinking plexi, no frames, with maybe wingnut type holders? I've seen velcro (too obvious) and screwed-in (too damaging to our original windows).