We have a double door and a single door. I liked to keep the double door open in the hot weather just to keep the garage ventilated, but living in a development and talking to neighbors, I decided to put a solar screen sliding door on the small garage door because of the lowlifes cruising the neighborhood checking out open garage doors. The screen is white and impossible to see into, but seeing out through the screen is very good. Now in summer it keeps the Florida heat in check and adds a small level of security.