I installed two of these￼ over a 17 foot balcony which is about 31 inches wide. I hung them 15 inches above the door frame of the balcony, and they provided perfect cover during a recent downpour here in Los Angeles￼. Highly recommended, but you should arrange professional installation. It’s a two-man job￼ Requiring a great deal of skill, strength and dexterity.  Make sure you read the QA to get the right answers for your wall