We take doors for granted, don’t we? Doors or doors that are not normally given their fair credit… are misused, abused, disrespected and mistreated. However, I think most of us would agree that they are important components of a modern home and that there are many, many different types of doors.

Often during a home inspection I hear someone refer to a door as French door. What is a French door? If you suspect the door isn’t necessarily from France, you’re probably right, Yes? So what is this type of door that is described as such?

When someone refers to a French door, they are likely referring to an exterior door which is a two-part door that is hinged on both sides… that is, both sides can be opened. Sometimes this type of door is known as bi-hinge door, but that’s a very general description and often refers to interior doors.

So what makes a French door a French door? Well, the name is derived primarily from the gate’s history rather than any modern geographical reference. The term French door has its roots as a description of an early French design called a casement door…and casement doors are marketed and sold under that type and name today.

As mentioned, a French door is usually a double door… and for which there is no center Mullion, or vertical dividing frame, between the two doors. Both sides are provided with separate weather stripping for protection from the elements. One or the other side is usually designated as the active side…and that side is used for normal input and output. The other side, the idle side, is most often kept in a closed and locked configuration. Sometimes the locking mechanism used is of a type called Spanish screw; With this type of lock, the operation of a single lever triggers the movement of a round metal rod that engages receptors on both the top and bottom sills of the door frame. Another partially distinguishing feature is that they often have an ornate, decorative molded panel at the bottom.

So the next time someone asks you if you know what a French door is, you might answer…Yes! Yes! Thank you!