Many pole building / post frame building owners choose to leave the vapor barrier on the fiberglass exposed. In this case the fiberglass blankets are cut to fit between the posts, giving the building a clean finished look. White plastic washers can be added to give the walls an additional finished look.
There are several facings available in both standard and heavy duty. Heavy duty facing is a great alternative to finishing the wall. It offers a cleaned finished look at a fraction of the cost of finishing the walls.