AskDefine | Define muntin

Extensive Definition

Muntin is a strip of wood or metal separating and holding panes of glass in a window. Muntins can be found in doors, windows and furniture, typically in western styles of architecture. The combination of muntins and glass creates a grid system dividing a single sash or casement into smaller panes, called "lights" or "lites". Until the middle of the 19th century, it was economically necessary to use smaller panes of glass, which were much more affordable to produce and fabricate into a grid to make large windows and doors. However, many considered the division of a window or glazed door into smaller panes to be more architecturally attractive than use of large panes. In the UK and other countries, muntins (typically called "glazing bars" in the UK) were nevertheless removed from the windows of thousands of older buildings during the nineteenth century in favor of large panes of plate glass. Restoration of these buildings in the following century increasingly included reinstatement of the glazing bars, which many now see as an essential architectural element in period buildings.
Muntins are also called "glazing bars", "astragals", "muntin bars," "false muntins" or, somewhat confusingly, "mullions". Many companies in the U.S. use the term "grille" when referring to a set of decorative muntin bars added to give a sash the appearance of a "true divided light" sash. In the UK, the term "grille" tends to be used only when there are bars sandwiched within the glazing unit, and not stuck to the outsides of it.
Windows with "true divided lights" make use of thin muntins, typically 1/2" to 7/8" wide in residential windows. In wooden windows, a fillet is cut into the outer edge of the muntin to "stop" the pane of glass in the opening, and putty or thin strips of wood or metal are then used to hold the glass in place. The inner sides of wooden muntins are typically milled to traditional profiles. In the U.S., the thickness of window muntins has varied historically, ranging from very slim muntins in 19th century Greek revival buildings to thick muntins in 17th and early 18th century buildings.
Double paned or insulated glass can be used in place of ordinary single panes in a window divided by muntins. Other insulating glass arrangements include insertion of a decorative grid of simulated metal, wooden or plastic muntins sandwiched between two large panels of glass, sometimes adding an additional grid of simulated wood muntins facing the interior to produce a more convincing divided light appearance.

See also

muntin in French: Croisée (fenêtre)
muntin in Polish: Szczeblina
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