Window muntins are simply the strips that separate the glass in windows or doors into smaller sections. Window muntins can be real, in the sense that they actually connect separate panes of glass to form a larger window. More likely, if you are looking at new products, window muntins will be false. Essentially, they are strips either within a multi-paned section of glass or on the exterior of the glass that make it look like the panes are actually made up of smaller panes of glass. They are very often seen on single and double hung windows.
Bottom Line: Muntins are a aesthetic choice that can make windows look great (if you like the look of them).
(Always collect 3 to 4 additional bids)
Bill — Site Editor
“Window muntins refer to the strips that separate the panes – although today most are simply made to look like they divide panes. They go by many names, including muntin bars, mullions, grilles, grids, glazing bars and astragals.”
Basics Of Window Muntins
Initially, they were designed as a way to turn small panes of glass into a larger window by connecting the small panes together. Back in the 19th century, this was a less expensive way to construct large windows than using a solid, large pane of window glass. In modern times, it is now less expensive to use one large pane, rather than connecting smaller individual panes.
Since many people still like the traditional look of divided light that window muntins offer, false versions can be placed on the exterior of a large pane of glass or within the glass itself (if it is double-paned) to produce the same look.
Window Muntins Materials
Today, window muntin manufacturers use a number of different materials that include wood, aluminum, metal, PVC or plastic. If they are placed on the exterior of a glass pane, they are typically made from the same material as the window frame itself. Muntins found within the glass itself are almost always vinyl or metal.
Style Options
All window muntins provide the same general look – the traditional feel of divided light. However, there are many different styles that create that look. As mentioned, muntins can be real or false. Manufacturers make muntins using all of the five major frame materials, including wood, vinyl, composite, aluminum, and fiberglass. Broadly speaking, muntins are replacement hardware because they are more of an add on than a core part of the window itself.
Real
These truly separate individual small panes of glass. Real muntins are almost always wood and add a great traditional touch to the overall aesthetic of the window.
False
Some manufacturers make false muntins that go on the outside or inside of the window glass and give the illusion of many panes. The great thing about these is that you can remove them if you want to switch up the look of the windows.
Interior muntins are permanent and and available in a variety of materials or colors. Interior muntins can sometimes affect the energy efficiency. The exterior versions can make a harder to clean the panes if they are not removable.
Removable
Removable muntins are typically on the outside and can be easily removed if you need to clean, or even paint, the window. Clips and/or screws hold the muntins in place. One additional benefit to removable muntins is that you can choose to take them off completely if you want a more contemporary look.
Design Options
There are as many design options as there are types of muntins (maybe even more!). Colonial windows have muntins separating the glass into equal sized panes, usually in six or nine sections. You will see these referred to as 6-lite or 9-lite windows. There are other options as well. Prairie muntins have a large pane in the center and then separate the window into small panes in the corners.
Manufacturers can also create a variety of different custom designs on just about any sized window. They come in different materials, different thicknesses, different colors, and different finishes.
Related Topics
Aluminum vs. Vinyl
uPVC Prices
Terminology
