Mullions and muntins are window parts that you may not be familiar with. They are often mistaken for each other due to how similar they sound, but you can usually see them in replacement windows.
In today’s post, Renewal by Andersen® of Greater Philadelphia guides you on the differences between mullions and muntins.
Nowadays, window companies rarely differentiate muntins and mullions because their differences are negligible and customers don’t notice them anyway. As the industry developed, muntins and mullions eventually developed under the universal term we know today: grilles. Both mullions and muntins work as a support structure for your windows. Today, grilles are used to improve the security and aesthetic of your windows. While not all windows come with grilles, they are sometimes offered as window accessories you can buy for an additional price.
Muntins commonly refer to any kind of vertical divider, whether it’s used on windows, panels, or doors. Back in the day, muntins were required to ensure that the weight of large windows was placed in the walls, allowing the weight to be transmitted vertically.
Mullions are different from muntins even though they both act as support systems for windows. They are vertical bars that you can find between window glass panes. Their origins date back to the pre-Victorian era, when manufacturing large sheets of glass was still impossible. To create a semblance of a large window, smaller windows were joined together with the help of mullions.
While both of these components may not serve any structural function nowadays other than adding aesthetic value, it’s a great way to appreciate the history behind grilles and how far the technology and innovations of the window industry have come.
If you need a reliable window replacement contractor, call on Renewal by Andersen of Greater Philadelphia! We carry the best windows and doors available in the market. Call us at 610-563-2190 or fill out our contact form for a FREE quotation! We serve customers in the New Jersey and Philadelphia areas.