Major home improvement chains and hardware stores offer prehung storm door kits in the most common door sizes—30, 32, 34 and 36 inches wide. If your door frame is larger, you can either order a ...

CR technicians Matthew Guayara (left) and Jonathan Tuczynski install a storm door in our lab. We assessed how well each door blocked drafts by mounting it in a frame and exposing it to a steady 25 ...