What is Mullion?

Mullion is an architectural device primarily used in the walls of windows, doors and glass curtain walls. Mullions are usually used as vertical supports, but some horizontal framing members can also be considered types of mullions. They are also used as part of the door frame to divide the hole into two separate sections, allowing a single frame to accommodate two separate doors. It was often found in churches and windows of stained glass. Today, a stone mullion is most often found in the courtyard and other outdoor spaces. Mullion divides the outer wall to allow air to pass and contain no glass. Modern door mullions are windows are made of wood, aluminum, steel or glass fibers.

Traditionally, Mullions were used as structural support for other building elements. They helped frame JAMB windows and provided additional stability to opening doors or windows. These structural elements were also used to decay large windows so that smaller boards withKLA, because larger leaves of glass were disproportionately expensive by the end of the 20th century. Today, these mullions serve primarily a decorative property and can be used to complement various decors and architectural designs.

builders can when creating windows or curtain. Mullion can be created using different profiles and can be square, rounded or complex like wood forming. Depending on the material selected, you can paint, spot or wax mullion to protect it from the elements and form the desired surface.

There are also several ways to install these devices. They are often located between two separate window units to function as a decorative accent. The ends of the Mullion may be cropped into the surrounding structure or left unanimous, although this technique is often dictated by wind levels and standards set by local building regulations. When two windows are placedside by side without a separate Mullion, two connected pieces of the Code are often referred to as Mullion. The pieces of thinner vertical framing that separate the wing of the window into individual boards are usually known as muntins or glazing rather than mullions.

In the sets of double doors, the vertical framing member between the doors is also known as Mullion. These mullions are often removable, allowing buildings to bring large objects to the door. If they are not used, these devices are locked using a traditional cylinder and keys.