---
title: "What Is Thermally broken steel? Window and Door Glossary"
description: "Thermally broken steel is a steel window or door profile with a built-in insulating barrier, so it keeps slim lines and better efficiency."
url: https://honeyrock.multisites.ai/glossary/thermally-broken-steel
publisher: Honey Rock Window and Door
phone: +1-214-484-9982
quote: https://honeyrock.multisites.ai/contact-us
---

# Thermally broken steel

Thermally broken steel is a steel window or door profile with a built-in insulating barrier, so it keeps slim lines and better efficiency.

Steel gives the thinnest frames and the most strength. On its own it conducts heat. A thermally broken profile adds an insulating barrier between the inner and outer steel. You keep the slim [sightline](https://honeyrock.multisites.ai/glossary/sightline) and gain real insulation.

Our partner Jada builds its steel line this way. It says its swing products use narrow sightline Secco OS2 thermally broken steel profiles, and that the two halves are joined with a pressure infused polyurethane thermal barrier. Learn more in our [steel windows and doors](https://honeyrock.multisites.ai/steel-windows-and-doors) pillar and the [thermally broken steel guide](https://honeyrock.multisites.ai/guides/thermally-broken-steel-windows). See also [thermal break](https://honeyrock.multisites.ai/glossary/thermal-break).

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

## Related terms

-   [Thermal break](https://honeyrock.multisites.ai/glossary/thermal-break)
-   [Sightline](https://honeyrock.multisites.ai/glossary/sightline)
-   [Slim-profile (thin-frame) window](https://honeyrock.multisites.ai/glossary/slim-profile-window)
-   [U-factor](https://honeyrock.multisites.ai/glossary/u-factor)

## Sources

1.  [Jada Windows: Swing products](https://jada.com/products/swing)
2.  [Jada Windows: Thermal design](https://jada.com/features/thermal-design)

![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)