Abstract: An exterior roll door for providing access to the interior of a trailer mounted on the outside, with door tracks on the outside in channels in the sides of a header, forming top rails, the door tracks having open sides facing outwardly and mounted inwardly from the rear edge of the trailer along the header, with the tracks along the header, before reaching the top corner of the trailer, curving towards the outer edges of the trailer, and then back to form top rails substantially flush with the roof of the trailer to allow the door to seal the trailer when in a down closed-position, while allowing the door to clear the corner of the trailer during opening, and then allowing the opened door to sit above the roof when in the up, fully-open position.