Interior Mylar Panels for your Sunrooms Do you have a three season porch? A room with a great view but you can only use it for 3 seasons. Extend your use of these rooms with Mylar panels from Screenitagain. Taking out the screens and putting in the Mylar panels makes the room warm enough to enjoy even in cooler weather. As the room warms up on sunny days you are augmenting your energy saving program with gentle passive solar. https://www.youtube.com/watch?v=1xC746UaPn8