> I've never seen persianas in the U.S., or anywhere outside Argentina. Retrofitting them into American houses would definitely not be trivial as either the per

> I've never seen persianas in the U.S., or anywhere outside Argentina. Retrofitting them into American houses would definitely not be trivial as either the persianas would have to roll up on the outside of the house or ride on rails on the inside of the house, or the window header would have to be moved up in order to fit the slats passing from the inside roll to the outside rails. I've seen what you're looking for in higher end hotels. In America, for outside of the window it's "roller shutters" for inside the window it's "roller shades". Most budget roller shades, inside of window, aren't true blackout as they don't come with a track, but the higher end ones do.