Mullions represent heavy, vertical pieces between adjoining window units that join window frames with one another. Fixed, operable windows can be performed using the muntin bars. They can also help strengthen a window structure and assist in transferring load from the glazing points to the wall by changing its shape and preventing any cracks that may occur. Mullions have many more functions than just separating glass panes. You can use them to create an elegant focal point or support large windows with multiple panels.
Before the Victorian Age and the advent of inexpensive plate glass, the manufacture of large sheets of glass was very rare. Even though there were more significant pieces of glass, they were used to create mirrors which were expensive at times.
Therefore, they had to create large windows with supportive mullions to hold small glass panes together. And since glass joints were also weak in case of large openings, they added some depth to distribute the wind load evenly. Additionally, mullion bars often contain decorative elements such as crown molding or other carvings.
These elements make them attractive when paired with stained glass inserts or clear glazing options like our translucent white vinyl. Window mullion styles have since evolved and are now used with large divided windows and doors. Window muntins muntin refers to the narrow strips of wood, metal, or most commonly plastic that divide a window into smaller panes that let in light. They are typically located within the window frame and hold the window panes intact through cross members attached with screws to keep them together.
They are any vertical divider used in windows, doors, and furniture, especially in older windows like the traditional sash windows. They are often used on large windows or French doors and can be made of wood, metal, or plastic. However, not all windows with individual panes have a wooden piece that divides them.
Instead, they have simulated divided lites. These lites resemble muntins but are encased within window panes. You can also add them on both the interior and exterior of the glass and over the outer surface of the front window panes to get an excellent divided look. Although muntins are associated with windows, they can mean any vertical divider, be it windows, wood panels, furniture, and doors. These are thinner and have a custom design since they aren't real.
Some windows have no dividers, having only the glass panes that sit next to each other until they meet an obstruction or end of the wall. Muntins are not only used in windows. They can be added to doors to create individual lites.
Both of these terms are used in window and door construction, and they describe dividing and joining glass and frames. The main difference between window mullions vs window muntins is that mullions divide openings while muntins divide glasses. Muntins are sash bars made of wooden and metal strips that separate and hold panes of glass in the windows. They divide single-hung window sashes or casements into a grid system of all small window panes. Additionally, mullions divide the window or door opening into smaller blocks, while muntins are the vertical pieces of wood separating glass panes.
Mullions also allow dissimilar items such as glass and vinyl to be joined together while the muntins separate them. When manufacturers refer to mullions, they think of both vertical and horizontal bars, but the correct name of the horizontal mullions is the transom. Window mullions and muntins are often confused because they can be technically identical.
Their difference is subtle but important. Unraveling the mystery means going back a few hundred years to England, where both terms originated. Muntin refers to the vertical dividers that separate glass panes in a window. Muntin applies only to the inner vertical pieces; the outer pieces that form the frame are stiles and rails. Even though muntins today are most frequently associated with windows , they can mean any kind of vertical divider, whether for windows , wood panels, furniture, or doors.
As far back as , the writer R. Holme referenced "moontans and panels. Smith, referenced "mountaynes" as being "six pieces of timber But the clearest early definition comes in , from an English architectural glossary that references, "English joiners [who] apply the term muntin to the intermediate upright bars of framing, and call the outside uprights styles. Early builders used muntins not for looks but because they were structurally necessary. Early buildings' outer walls could not carry the weight when large windows were placed in the walls.
Muntins allowed for weight to be transmitted vertically. This would especially have been the case with Westminster's vast amounts of fenestration: Its west window is close to 45 feet high. Mullions are different from muntins, though they both act as supporting devices. Generally, mullions are the single vertical bars that separate two sides of a single window.
The Oxford English Dictionary calls a mullion "A vertical bar between the panes of glass in a window. Giant expanses of windows were achieved by holding smaller panes of glass together by supportive devices. Two separate windows that are closely mated can even have that thin separating element referred to as a mullion, even though it is technically part of the wall.
In the truest sense, muntins are the vertical pieces of wood separating panes of glass in a classic multi-pane glass assembly.
Mullions are the single vertical supports used in two-pane assemblies. Muntins separate panes of glass, while mullions divide two or more windows or door frames together. They can run both horizontally or vertically. Mullions serve many purposes. For example, they can divide a stationary and a movable set of windows, so you can easily allow fresh air into your home. These elements also add depth to resist wind load, which is especially crucial for hurricane susceptible climates.
When it comes to applying muntins and mullions to your home, shape, color and material are important. What color you choose to paint your muntins and mullions can make a huge difference in your exterior redesign project. Once you nail down the right color, choosing the right material is easy. Wood is a timeless, go-to material for muntin, while stronger materials like steel are a good option for mullion.
Muntin comes in many different shapes, while mullion is generally just a simple, straight line. They work well on any window shape, from a circle to a perfect square.
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