The concept of treating External Doors requires diligence, patience, and care. This is because external doors face some unique challenges as opposed to their counterparts, the interior doors. The treatment process is time consuming. The door treatment itself, however, can range from applying surface finishes, such as a gloss or preservative, to attachments like blinds or curtains. The treatments mostly have functional purposes for maintaining the structural and elemental integrity of the door.Depending on the style of treatment, doors can be treated either before or after they are installed. Most finishes, however, need to be applied before the door is installed. This includes all sealants, stains, varnishes, and preservatives. For the color coatings a primer is a mandatory prerequisite. The regional climate is the primary dictator of the type and frequency of finishes. For instance, the colder more seasonal climates require frequent maintenance.