Windows

Window Mullions and Window Muntins: What’s the Difference?

Mullions and muntins are often used interchangeably, but it’s interesting to note that these two features are distinct from each other. Renewal by Andersen® of Montana, a top-rated provider of sliding windows, discusses the difference between muntins and mullions.

Window Mullions

Mullions are basically the vertical bars that you can find between the panes of glass in a window. They go way back the pre-Victorian Age when manufacturing large sheets of glass was still impossible. In order to create large expanses of windows, smaller panes of glass were attached to each other and held together by supportive mullions.

Window Muntins

Muntins are fairly common nowadays, but the term is often referred to in window replacement projects as any kind of vertical divider. Their main purpose in the early years, however, was to ensure that the weight of large windows were transmitted vertically on the outer walls of a building. The walls of old buildings usually could not support the weight of large windows, so muntins were considered structurally necessary.

Considering the main roles that muntins and mullions used to play, these features basically do not have any structural function nowadays. Homeowners simply add them to their windows for aesthetic reasons. That said, muntins and mullions are now generally lumped into one single category called “grilles.” Any window element that no longer has a structural function belongs to this group. Keep in mind, though, that adding any of these features to your windows will likely incur an extra charge. If you have a historic home and want to preserve its traditional look, muntins and mullions would surely be a good option to consider.

Renewal by Andersen of Montana offers an array of window styles including casement windows, double-hung windows and picture windows among others. Our team is composed of professional installers who will ensure quality results for your project. Call us at (406) 259-3944 or fill out our contact form to request a free estimate.

Andy Stellpflug

Recent Posts

6 Ways to Ensure Window Replacement Success

When embarking on a window replacement project, its success hinges on meticulous planning and execution.…

3 days ago

Choosing a New Window: Why Fibrex®?

When it comes time to choose new windows for your home, the options can seem…

6 days ago

Common Window Problems to Watch Out For

Maintaining your home's windows in top-notch condition is essential in the face of extreme weather…

1 week ago

5 Design Ideas for Holiday Window Decorations

As the holiday season approaches, homeowners are beginning to think about decorating their windows to…

2 weeks ago

Top 5 Reasons to Choose Specialty Windows

While traditional windows are square or rectangular, specialty windows come in various unconventional shapes. They…

1 month ago

Why Should You Winterize Your Windows?

As the air gets chillier, it's crucial to ensure your home is ready for the…

1 month ago