Architects understand the vital role windows play in shaping a building’s character. One timeless feature often found gracing structures with elegance, is the divided-light window. These windows, with multiple panes separated by muntins, have a rich history and continue to captivate homeowners and designers alike.
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What Are Divided-Light Windows?
To begin with, let’s elucidate the concept of divided-light windows. Divided-light windows are characterized by dividers or grids that fragment the glass panels into smaller components. This may sound straightforward, but you might not have been aware of the specific terminology associated with these window types.
Divided-light windows contribute a sense of traditional charm, and architectural fascination, and create appealing shadow effects. They are commonly found in Craftsman, Colonial, and Mediterranean-style residences. Conversely, contemporary homes often opt for undivided windows to achieve a cleaner and more streamlined appearance.
A common question that arises is whether the dividers serve any functional purpose beyond their aesthetic appeal. The answer hinges on whether the window is a true or simulated divided-light window.
Before delving into the distinctions between these two types, let’s take a moment to revisit our glossary of window-related terms and their definitions. (Here’s a fun tidbit: even the dividers themselves have a unique designation!)
Window Terms
- Frame – the encompassing structure of a window that fits into and affixes to the adjoining wall.
- Sash – the movable part of the window connected to the frame, responsible for securing and supporting the glass panes.
- Stiles – the vertical elements of the window sash.
- Rails – the horizontal components of the window sash.
- Pane – the glass-enclosed within the sash.
- Muntins/Grilles – the separators within the glass panes, either providing structural support in true divided-light windows or serving a decorative purpose in simulated divided-light windows.
- Spacer Bar – the bar that separates two glass panels in insulated windows.
- Sill – the external bottom ledge of the window, anchoring it in place and diverting rainwater away from the window frame.
- Stool – the inner bottom ledge of the window, serving as a finishing touch.
- TDL – the abbreviation for true divided light, denoting windows that utilize structural muntins to divide glass panels into smaller sections.
- SDL – the abbreviation for simulated divided light, representing windows that use imitation muntins for aesthetic purposes.
- GBG – the acronym for grids between glass, indicating simulated divided-light window muntins positioned between two glass panels in insulated windows.
True vs Simulated Divided-light Windows
Having acquainted ourselves with crucial window terminology, let’s elucidate the distinctions between authentic and simulated divided light.
The genesis of divided-light windows stemmed from the practicality of transporting smaller glass panels, reducing vulnerability to breakage and cracks. In a genuine divided-light (TDL) window, muntins serve a utilitarian function by securing these smaller panels within the broader window sash.
Authentic divided light is prevalent in historic residences featuring original wooden windows or replacement windows for dwellings situated in historically regulated districts with stringent construction regulations.
Simulated divided-light (SDL) windows closely resemble authentic divided-light windows, with the key distinction lying in their application. Unlike true divided-light windows, SDL windows feature a single continuous pane of glass in the sash, eliminating the necessity for physical division for practical purposes.
The simulated divided light is purely for aesthetic purposes. The ornamental muntins, contributing to the window’s visual appeal, can be incorporated in two primary manners.
Firstly, they can be affixed externally to the glass, providing a three-dimensional appearance akin to genuine muntins when viewed from the street.
Alternatively, these decorative elements can be fashioned using Grilles Between Glass (GBGs), where the muntins are positioned between the glass layers. In the case of insulated windows with GBGs, the muntins are securely attached to the spacer bar that separates the dual glass panes. This configuration ensures easy maintenance but may result in a more flattened visual profile.
Choosing Between True and Simulated Divided Light
Opting for either genuine or replicated divided-light windows hinges on the distinctive requirements of the residence, visual preferences, financial considerations, and maintenance concerns. In the context of older historic residences, adhering to architectural authenticity and historical building codes often makes genuine divided light the preferred choice.
Aesthetics play a pivotal role for numerous homeowners. Authentic divided-light windows boast sturdier and more intricately designed muntins, along with individual glass panels that distinctly interact with light and shadow compared to a single glass panel divided by flat muntins.
Conversely, simulated divided-light and grille-between-glass (GBG) windows offer hassle-free maintenance with uncomplicated cleaning routines and budget-conscious pricing.
Applying Divided-Light Windows for Distinctive Home Architectures
Divided-light windows are commonly arranged in sets of four, six, or nine “lights,” which refer to the squares created by the muntins or dividers. It’s noteworthy that the top and bottom sashes need not match, and it’s a prevalent practice to observe divided top sashes paired with undivided bottom sashes in various architectural styles, such as the Craftsman style.
In the case of a traditional Colonial home, it is typical to find four or six lights on both sashes, while a cottage-style residence might exhibit nine lights.
Moreover, divided-light windows can incorporate more distinctive configurations, such as exclusive vertical muntins or Prairie Style muntins that segment the window into a large square with smaller squares in the corners.
When choosing the appropriate divided-light windows for your home, it is advisable to delve into the architectural style’s historical use or seek guidance from a knowledgeable architect well-versed in the elements of the specific architectural design.
FAQs
How much does a true divided light window cost?
Including the snap-in or interior grids will incur an additional charge of $300. If you opt for simulated divided light, the expense per window is $380, while true divided light comes at a cost of approximately $460. In comparison, a standard single-hung, double-paned vinyl window typically begins at around $125 to $150, according to Jenifer.
What are true divided light windows?
True divided light windows are traditional windows characterized by individual panes of glass separated by muntins, creating a grid-like pattern. They offer an authentic, classic look, but their cost is often higher compared to modern alternatives.
What is the difference between Marvin SDL and GBG?
Marvin SDL (Simulated Divided Light) uses bars on the exterior and interior surfaces of the glass, mimicking the appearance of true divided light windows. GBG (Grilles Between Glass) features bars sealed between two panes of glass, providing a similar aesthetic but with easier cleaning and maintenance.
What are TDL windows?
TDL windows, short for True Divided Light windows, are characterized by having multiple individual panes of glass separated by muntins. They provide a classic and authentic aesthetic, but their cost is typically higher compared to other window types.
