Schools
Security glazing enhances school safety by resisting forced entry and delaying intruders, providing critical response time without compromising light, visibility, or design.
Forced Entry Glass
Thompson Innovative Glass manufactures several Safety Glass options including Forced Entry Glass under its Defender ® line.
FE Class
ASTM F1233
Classes
1.1
1.3
2.0
Forced Entry Glass
Forced Entry Glass refers to a specialized type of glass that is designed to resist breakage or penetration attempts, typically through impact or blunt force. This glass is engineered for security purposes and is composed of layers of materials, such as laminated glass or a polycarbonate, that work together to absorb and dissipate energy when subjected to force.
These layers are bonded together, often with a tough interlayer, making the glass highly resistant to shattering or being compromised. Thompson Innovative Glass has tested our Defender products to the ASTM F1233 standard and continues development to provide the end user with the best possible options.
Make-Up Features
Glass
The glass layers provide structural integrity and rigidity of the unit. Glass causes the bullet to flatten upon impact and consequently reduces its velocity and disperses the kinetic energy over a broader area. The glass properties (thickness, annealed, heat-treated etc.) and number of layers varies by product. Available glass options vary by offering and include tints, reflective, bird-friendly, low-e, and low iron.
Polycarbonate
Thompson utilizes an optical grade Polycarbonate, a thermoplastic material known for its clarity, durability and strength. As the two outer layers of this makeup, they are responsible for absorbing and dispersing the energy of the bullet or projectile upon impact. Compared to a regular glass product, Polycarbonate’s strength makes it less likely to shatter upon impact which is an essential factor in the performance of the glass and the application. The exposed interior polycarbonate layer has an abrasion resistant coating on its surface for the purpose of providing excellent abrasion and chemical resistance. Take special care and follow specific instructions when cleaning polycarbonate as permanent damage may result if cleaned incorrectly.
Adhesive Interlayers
Thompson uses both high optical grade polyvinyl butyral (PVB) and other proprietary interlayers to bond multiple layers of glass. The interlayers act as the “glue” that hold the various glass layers together.
Protection
Defender forced entry glass features multiple make-ups and performance levels and can be combined with energy efficiency products as well as bird-friendly materials
Key Features
Impact Resistance
Able to withstand blows from hammers, crowbars, or other tools typically used in break-in attempts.
Shatterproof
While the glass may crack under extreme force, it remains intact rather than breaking into pieces, preventing entry.
Durability
The glass is built for long-term use, retaining its security properties over time.
Customization
Can come in various thicknesses and layers depending on the level of protection needed.
Applications-Security and Protection
Bullet-resistant and forced entry glass are critical components in protecting people and property across a wide range of high-risk environments. These specialized glazing solutions are trusted wherever enhanced security and peace of mind are essential, from public institutions to private facilities. Common applications include:
Hospitals
Healthcare environments use safety and security glazing in patient rooms, lobbies, and sensitive areas to enhance protection and hygiene without sacrificing light or openness.
Retail Storefronts
These retail spaces utilize protective glass to deter crime and protect staff, particularly during overnight hours or high-traffic periods.
Correctional Facilities
Glazing in correctional environments must meet rigorous standards for containment, safety, and visibility while withstanding impact and tampering.
Power Generation Sites
These critical infrastructure locations require secure glazing systems to guard control rooms and equipment against potential attacks or natural hazards.
Transportation Hubs
Bus, train, and transit stations need high-performance glass for public safety, blast mitigation, and clear communication in high-traffic zones.
Maximum Size
Maximum size for All Glass
72" x 130"
Frequently Asked Questions About Forced Entry Glass
What is forced entry glass?
Forced entry glass is specially designed to resist breakage or penetration attempts during a physical attack. It's function is to delay entrance by intruders, enhancing safety in residential, commercial, and institutional settings.
How does forced entry glass work?
Forced entry glass typically combines laminated layers of glass with interlayers like polycarbonate or PVB. These materials absorb and distribute the force of an impact, preventing the glass from shattering easily or creating openings for entry.
How is forced entry glass tested?
Forced entry glass is tested according to standards like:
- ASTM F1233: Evaluates the resistance of glass to manual attacks with tools.
- ASTM F3561: Simulates forced entry after ballistic damage.
- EN 356 (European Standard): Rates glass based on its ability to withstand hand-held tools and mechanical impacts.
What are the applications of forced entry glass?
- Forced entry glass is commonly used in:
- Schools and universities
- Government and military facilities
- Retail stores and shopping centers
- Residential properties in high-risk areas
- Commercial buildings requiring added security
Can forced entry glass also be bullet-resistant?
Yes, some forced entry glass products are designed to provide both forced entry resistance and ballistic protection. These products typically meet multiple safety standards, but not all forced entry glass is bullet-resistant. See more in our Defender section.
How thick is forced entry glass?
The thickness of forced entry glass depends on its rating and intended application.
Can forced entry glass be retrofitted?
Yes, it can often be retrofitted into existing frames. However, some retrofits may require structural modifications for optimal performance.
What are the benefits of forced entry glass?
- Deters intruders by making break-ins more difficult.
- Delays forced entry, providing occupants more time to respond.
- Enhances safety without compromising visibility or aesthetics.
How does forced entry glass differ from standard glass?
Standard glass is prone to shattering upon impact, while forced entry glass is designed to resist impacts, remain intact, and prevent easy access through the glass.
Is forced entry glass energy-efficient?
Yes, many forced entry glass products are available as insulated glass units (IGUs) with energy-efficient coatings, combining security with thermal performance.
Your Guide to Bullet-Resistant Glass Options
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