---
title: "What Is Muntin? Window and Door Glossary | Honey Rock Window and Door"
description: "A muntin is a slim bar that divides one pane of glass, or one sash, into smaller panes called lites."
url: https://honeyrock.multisites.ai/glossary/muntin
publisher: Honey Rock Window and Door
phone: +1-214-484-9982
quote: https://honeyrock.multisites.ai/contact-us
---

# Muntin

A muntin is a slim bar that divides one pane of glass, or one sash, into smaller panes called lites.

Muntins give a window its grid look. In classic steel-style windows, true divided lites use thin bars with a pane of glass in each opening. Other styles lay bars on the glass or place them between the panes for a similar look.

People often mix up muntins and [mullions](https://honeyrock.multisites.ai/glossary/mullion). A muntin sits inside one [sash](https://honeyrock.multisites.ai/glossary/sash). A mullion joins separate units. Narrow muntins are a hallmark of steel, and the material shapes how slim they can be. See our [steel windows and doors](https://honeyrock.multisites.ai/steel-windows-and-doors) and [slim-profile windows guide](https://honeyrock.multisites.ai/guides/slim-profile-windows). Ask whether bars are true divided, applied or between the glass, because each looks and cleans differently.

[Where it mattersSteel windows and doors](https://honeyrock.multisites.ai/steel-windows-and-doors)

## Related terms

-   [Mullion](https://honeyrock.multisites.ai/glossary/mullion)
-   [Sash](https://honeyrock.multisites.ai/glossary/sash)
-   [Sightline](https://honeyrock.multisites.ai/glossary/sightline)
-   [Slim-profile (thin-frame) window](https://honeyrock.multisites.ai/glossary/slim-profile-window)

![A modern home with wide glass doors lit warm at dusk beside a pool](https://honeyrock.multisites.ai/_astro/dusk-modern-home-pool-01.CeePxgPr_Z2giQin.webp)

## Let’s frame your view.

Send your plans or a few photos of the openings. We will help you choose the system, the brand and the glass.

[Start your project](https://honeyrock.multisites.ai/contact-us)[or call (214) 484-9982](tel:+1-214-484-9982)