ehomedecor selling variety and various range of flush doors. Flush doors are simple door designs that have plain facings on both sides. They can be interior (more commonly) but also exterior. They are often used where space is at a premium, and would probably be placed towards the “functional” end of the door design spectrum rather than the “style” end … but as with anything, a little imagination goes a long way! They may be kept deliberately simple in appearance to highlight other features nearby.