Outside mounts are most common when it comes to vertical blind installation. The first step is to secure your mounting brackets to the wall evenly above the window frame. Next, use mounting clips to secure the headrail. Place the headrail edge into the short side of the mounting clip and snap the backside of the rail into the clip.
Slide the valance into the valance clips on the mounting bracket and place the valance corners on each side. Now place the valance returns on the on the corners. These returns may have to be cut to fit your valance. Finally snap the vanes into each clip on the headrail and test your blinds.