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What is the difference between mullion and muntin?

Published in Architecture 2 mins read

While both mullions and muntins are architectural elements that divide window panes, they differ in their location and function:

Mullions

  • Location: Mullions are vertical or horizontal structural members within a window frame.
  • Function: Mullions provide support and stability to the window frame, dividing it into separate sections.
  • Appearance: Mullions are typically wider and more prominent than muntins.

Muntins

  • Location: Muntins are thin, decorative strips within a window pane, dividing it into smaller sections.
  • Function: Muntins primarily serve an aesthetic purpose, creating a grid-like pattern within the window pane.
  • Appearance: Muntins are generally thinner and less noticeable than mullions.

Examples:

  • A mullion might separate a large window into two smaller windows, while muntins could divide each of those smaller windows into multiple panes.
  • Mullions are often used to create large windows with multiple sections, while muntins are commonly used in smaller windows for a more traditional look.

Practical Insights:

  • Mullions are essential for structural support, while muntins are purely decorative.
  • Mullions can be made from various materials, while muntins are often made from wood or plastic.
  • Mullions can be found in both modern and traditional architecture, while muntins are more commonly associated with older homes.

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