---
title: "What Is Rough opening? Window and Door Glossary"
description: "The rough opening is the framed hole in the wall, before trim, where a window or door is set. Window and door glossary from Honey Rock Window and Door, Dallas."
url: https://honeyrock.multisites.ai/glossary/rough-opening
publisher: Honey Rock Window and Door
phone: +1-214-484-9982
quote: https://honeyrock.multisites.ai/contact-us
---

# Rough opening

The rough opening is the framed hole in the wall, before trim, where a window or door is set.

The rough opening is built from studs, a header and a sill plate. It is always a bit larger than the window or door frame so the installer can set the unit plumb and level, then shim and seal it. Common practice leaves a small gap on each side.

If you replace a unit, the existing opening may not match the new product. Measure the opening, not the old frame. Wrong sizes cause delays and leaks. Our post on [rough opening vs frame size](https://honeyrock.multisites.ai/blog/rough-opening-vs-frame-size) explains how the two compare. Proper [flashing](https://honeyrock.multisites.ai/glossary/flashing) around the opening keeps water out, and the [jamb](https://honeyrock.multisites.ai/glossary/jamb) lines the sides.

[Where it mattersWindow replacement in Dallas](https://honeyrock.multisites.ai/window-replacement-dallas)

## Related terms

-   [Flashing](https://honeyrock.multisites.ai/glossary/flashing)
-   [Jamb](https://honeyrock.multisites.ai/glossary/jamb)
-   [Sill](https://honeyrock.multisites.ai/glossary/sill)
-   [Egress](https://honeyrock.multisites.ai/glossary/egress)

![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)