Backglazing: Retrofit Ballistic Protection for Existing Windows

The bulletproof protection you need, the customization you want, and the aesthetics you value.

An example of a ballistic glazing retrofit that saves the time and costs of a full bullet proof window replacement while still delivering protection

Backglazing Can Stop a Bullet

If windows simply can’t be replaced with a bulletproof option, a common suggestion is to use security window film instead. While film is a great product in the right application, it’s not suitable for protecting human lives as it does not stop a bullet. Because backglazing is made from bulletproof glass that undergoes rigorous testing to ensure its performance under fire, you can trust that if the unthinkable happens, your people will have bulletproof protection.

Backglazing Preserves Historical and Aesthetic Integrity

Plenty of buildings simply can’t replace their existing windows with ballistic alternatives. Whether the construction is too delicate, the windows have historical significance, or the aesthetics make replacing with bulletproof material impractical, backglazing lets you preserve what matters most while adding a layer of protection.

Backglazing Keeps High-Performance Windows in Place

Protecting the planet and protecting people can go hand-in-hand. Adding backglazing to existing high-efficiency windows protects your investment and makes your facility that much more prepared for events in an uncertain future.

Backglazing Is Time and Budget-Friendly

Removing existing windows and frames requires significant specialized construction services. Backglazing is a simpler process with fewer risks. This shortens your project timeline and reduces your overall costs without compromising your protection.

Extensive Custom Options

When considering options for ballistic protection, facility owners and managers commonly run into the issue of how to balance security with the building’s current exterior aesthetics. TSS offers solutions for unique ballistic protection needs.

Premanent Ballistic Backglazing - TSS

Permanent Backglazing

Permanent backglazing is set in place behind your existing exterior windows. This option includes ballistic framing.

Hinged Ballistic Backglazing - TSS

Hinged Backglazing

Hinged backglazing swings open, giving you easy access to the exterior window to clean and do maintenance.

Freestanding Ballistic Backglazing - TSS

Freestanding Backglazing

Freestanding backglazing is typically attached to the floor to provide protection for floor-to-ceiling windows.

IWFA: "Extreme Caution Should Be Taken" with Security Window Film

The IWFA recently published a statement on the use of security window film, clarifying that while film is a helpful tool in many different scenarios, it can’t stop bullets. If you’re looking for bullet-resistant protection, be wary of films that claim to have this capability—especially if used in conjunction with bulletproof glazing.

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Retrofitted Bulletproof Window Protection

Backglazing is the perfect solution for businesses that would like to increase their level of security without doing significant construction. Our experienced team will work with you to choose the right bulletproof glass and framing to match your building’s aesthetic.

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Backglazing Window Options

Backglazing can be made from any ballistic glass depending on your specifications:

Acrylic
Polycarbonate
Glass-clad polycarbonate

You can view our backglazing product specifications online, or contact our team for more information.

TSS_Glazing_Acrylic and LP_L1_Wide_01

An example of freestanding backglazing to provide protection from ballistic threats

Securing Corporate Offices with Freestanding Backglazing

This corporate office’s floor-to-ceiling glass windows are beautifully designed. They give the building a distinctive look that would be impractical to replicate with bulletproof glass. Adding freestanding backglazing in the building’s interior offered the bulletproof protection the company was looking for without the costly and extensive renovations that replacing the existing glass would have required.

Frequently Asked Questions

Why is proper installation and framing so important for backglazing?

Because ballistic glass is much heavier than standard glass, it requires a purpose-built framing system to support its weight safely. An intentional air gap between the existing window and the ballistic panel is also necessary to allow airflow—preventing condensation, fog, or frost from forming between panes. This gap may allow light dust to collect over time, which is normal and indicates proper ventilation.

How does backglazing handle weather exposure?

Because backglazing is installed inside the building, it’s protected from weather and UV damage. This makes it possible to use lighter, more versatile materials like acrylic or polycarbonate—options that wouldn’t typically be suitable for exterior use—without compromising safety, clarity, or aesthetics.

Why is backglazing a smart choice for upper-story windows?

Backglazing offers significant cost and installation savings for upper-story windows by avoiding the need for cranes, riggers, street closures, permits, and coordination with city agencies. Since the ballistic glass is installed from the inside, it simplifies logistics, reduces disruption to daily operations, and eliminates many of the expenses associated with full ballistic window replacement.

Does backglazing provide forced-entry protection?

While some ballistic materials naturally resist impact, true forced-entry resistance requires products that are specifically engineered and rated for that threat. If forced-entry attacks are a concern for your facility, our team can guide you toward options that meet ballistic and forced-entry industry standards.

Where else is backglazing used besides corporate offices?

Backglazing is widely used in schools, healthcare facilities, government buildings, historic landmarks, and retail spaces—anywhere security is a concern but replacing exterior windows isn’t practical.

Total Security Solutions Can Help You Improve Your Safety without Sacrificing Your Aesthetics with Backglazing

If you’re concerned about protecting your staff from bullets, don’t wait to contact us about backglazing. Our passionate team is ready to help you get started and provide reliable protection for your facility; request a quote today.