They can really decorate a room or a house. From a design standpoint, the looks are endless as well. You can have arched French doors or even install transoms on top of the door. Adding side lights next to the doors can further enhance the effect. Transoms, windows above the door which echo the look of the door, are particularly common in older buildings like schools, where their main function was ventilation.
French doors can open by swinging in or out, gliding, or sliding.
Depending on how wide the space is, you can combine stationary French doors next to operational French doors. There are even faux French doors which are made of a single pane of glass onto which a grille has been applied to create the impression of individual panes of glass. French doors are most popularly made of pine or fir but can come in oak, hemlock and even exotic woods like teak and rosewood. The glass in the French doors can be beveled or flat, clear or frosted, plain or with oval inserts. A perfect complement to the wood in the French doors is brass hardware for the handles and hinges.