I would assume there are some fivers that will fit under your door but it seems the builders have been continually raising them to keep up with the higher riding trucks we use to pull them. We have a 13' high door on our garage that was great for our 12' 6" high motorhome we used to own but the Excel wouldn't fit without removing a trim board and changing the bedroom air to a lower profile model. If you can modify your garage I would do a minimum of 14' and hope the ride height war with the trucks ends soon.