The Engineer’s Blog

Guides

What UL 752 Level Do You Need? A Guide for Businesses and Buildings

Choosing the wrong UL 752 level is easier than most people think. Here's how to get it right before you specify anything.

October 26, 20268 min readRead Guides

Bullet Resistant Doors vs. Standard Security Doors: What Actually Stops a Bullet

A heavy commercial door isn't the same as a bullet resistant door. Here's what actually separates them - and why the distinction matters more than most people realize.

October 19, 20268 min readRead Schools

Bullet Resistant Windows for Schools: What Security Teams Need to Know Before Buying

If your school is evaluating bullet resistant windows, the details matter more than most vendors let on. Here's what to look for before signing anything.

October 12, 20268 min readRead Glass & glazing

How Much Does Bullet Resistant Glass Cost in 2026?

Bullet resistant glass cost isn't a single number - it's a system. Here's what actually drives the price, from UL 752 levels to framing and fabrication.

October 5, 20268 min readRead Glass & glazing

What Is the Difference Between Bullet Resistant Glass and Bulletproof Glass?

The term "bulletproof glass" is everywhere - but it doesn't exist as a tested, certified product. Here's what the industry actually uses, and why the distinction matters.

September 28, 20268 min readRead Planning & design

Future-Proofing Building Designs with Bullet-Resistant Materials

A well-designed building isn’t just functional-it’s built to last. Robust designs play a vital role in ensuring safety, utility, and durability.

August 10, 20263 min readRead UL 752 & ratings

Deciphering The Bulletproofing Maze Understanding UL 752 NJJ and Astm Standards

Understanding bulletproofing standards like UL 752, NIJ, and ASTM is crucial for anyone concerned with safety and security.

August 10, 20264 min readRead Glass & glazing

Why Bullet Resistant Glass Is the Best Choice for Maximum Protection

As safety and security become more essential in our everyday lives, the materials we select for protection become critically important.

August 10, 20263 min readRead Schools

Schools Squander Millions to ‘Bulletproof’ Windows. It Doesn’t Work.

Window-film dealers who sell to school districts claim their product is the answer.

August 10, 202612 min readRead Planning & design

Maximizing Safety and Security: The Importance of Bullet-Resistant Materials in Design Planning

In today's world, safety and security are top concerns for many people. Designers in various fields must prioritize the protection of users in their creations.

August 10, 20264 min readRead Glass & glazing

Can Film Truly Replace the Reliability of Bullet Resistant Systems?

In today’s world, safety and security are major concerns for individuals and organizations. As instances of violence and crime rise, many explore various protective measures…

August 10, 20268 min readRead Schools

Uncovering New Horizons: The Future of School Safety and Innovative Security Measures

As concerns about safety in educational institutions continue to grow, schools are increasingly looking for innovative security measures to protect students and staff.

August 10, 20264 min readRead Panels, doors & materials

Unveiling the Transformation: How Bullet Resistant Systems Have Shed Their Ugly Image

In recent years, bullet resistant systems have undergone a significant transformation. Gone are the days when these systems were synonymous with harsh aesthetics and bulky…

August 10, 20264 min readRead UL 752 & ratings

A guide to bullet resistance: Exploring UL levels 1-10

If a ballistic threat occurs, it happens in seconds and there’s no time to wonder whether your materials are up to the task.

August 10, 20264 min readRead Glass & glazing

How bullet resistant is polycarbonate?

A transparent sheet that can stop a bullet? It seems unlikely at first-more like a contradiction in terms than a practical solution.

August 10, 20264 min readRead Glass & glazing

What is bullet-resistant glass?

The moment a bullet strikes glass, failure can occur in an instant if the material isn’t designed to withstand the force.

August 10, 20264 min readRead Glass & glazing

How ballistic glass actually stops bullets

Ballistic glass is a material designed to do what ordinary glass cannot: stop a bullet in motion.

August 10, 20264 min readRead Glass & glazing

What is bulletproof glass made from?

Learn how bulletproof glass combines glass, polycarbonate, interlayers, acrylic, and transparent ceramics to provide clear, layered protection against different ballistic…

July 20, 20264 min readRead UL 752 & ratings

Exploring UL levels 1 – 3

Security strategies often start by evaluating the types of firearm threats a space is most likely to face.

July 20, 20265 min readRead UL 752 & ratings

Exploring UL levels 4 – 6

Security threats evolve quickly, and so must the materials designed to stop them. UL 752 levels 4 through 6 address the growing need for protection against rifles, submachine…

July 20, 20265 min readRead UL 752 & ratings

Exploring UL levels 7 – 9

Physical security begins with materials that are tested to perform under fire. UL 752 levels 7 – 9 define how that performance is measured, offering a structured approach to…

July 20, 20265 min readRead UL 752 & ratings

Exploring UL level 10

UL level 10 is not built for the everyday. It is engineered for scenarios where ballistic protection must withstand the impact of a .50 caliber Browning Machine Gun (BMG)…

July 20, 20265 min readRead Panels, doors & materials

Ballistic Panels: UL 752 Tested, Fire-Rated, and Seamlessly Integrated

Ballistic panels are engineered composite materials designed to provide bullet-resistant protection in walls, furniture, and millwork.

July 20, 20263 min readRead Panels, doors & materials

Ballistic Steel Vs Aluminum: Comparing Properties of Bullet Resistant Alloys

Compare ballistic steel and ballistic aluminum to understand how their strength, weight, durability, and fabrication characteristics influence the right material choice for…

July 20, 20264 min readRead Planning & design

What Bulletproof Products are Ideal for Bank Security

Banks face a range of physical threats that can compromise safety and operations, including armed robbery, forced entry, and targeted attacks, putting staff, customers, and…

July 20, 20265 min readRead Planning & design

Custom Ballistic Safe Rooms

Modern safe rooms combine certified ballistic protection with elegant architectural design, allowing homes and businesses to enhance security without sacrificing style or…

July 20, 20263 min readRead Planning & design

Emerging Threats in Physical Security: What Every Building Owner Should Ask Today

The world of physical security is changing, fast. From retail and dispensary break-ins to threats against schools, banks, and government facilities, today’s buildings face…

July 20, 20263 min readRead Panels, doors & materials

Fiberglass Ballistic Panels vs. LytArmor™ UHMWPE: What’s the Real Difference?

Compare fiberglass ballistic panels and LytArmor™ UHMWPE to see how weight, thickness, strength, flexibility, and long-term value impact modern ballistic protection projects.

July 20, 20263 min readRead Schools

Cutting Protection Costs in School Security Puts Occupants at Risk

School security is no longer a theoretical discussion. It is a real-world responsibility that directly impacts the safety of students, teachers, and staff.

July 20, 20263 min readRead Panels, doors & materials

Ultra Thermal Bullet Resistant Systems: The Future of Building Performance and Security

Traditionally, architects and owners have been forced to choose between energy efficient glazing systems or bullet resistant security systems.

July 20, 20263 min readRead UL 752 & ratings

Forced Entry vs Ballistic Protection What Is the Difference and Why It Matters

When people talk about “security glass,” they often assume it all does the same thing.

July 20, 20264 min readRead UL 752 & ratings

What Is the Difference Between UL 752 and NIJ?

UL 752 and NIJ are both ballistic resistance standards, but they are designed for different purposes and should not be treated as interchangeable.

July 20, 20266 min readRead UL 752 & ratings

The Ultimate 2026 UL 752 Guide

“Bulletproof” is marketing. Real protection is tested ballistic resistance against specific, defined threats.

July 20, 20264 min readRead Glass & glazing

Bullet Resistant Film vs Bullet Resistant Glass: The Dangerous Myth Putting Occupants at Risk

In recent years, schools, houses of worship, government facilities, and commercial buildings have spent hundreds of millions of dollars attempting to improve security.

July 20, 20265 min readRead Planning & design

Bullet Resistant Safe Rooms for Homes and Offices: Protection Without Sacrificing Design

When most people hear the term "safe room," they imagine a steel bunker hidden behind a vault door.

July 20, 20265 min readRead Panels, doors & materials

Why Ballistic Wood Doors Are Changing the Way We Protect Buildings

When most people think of a bullet-resistant door, they picture a heavy steel or institutional-looking opening that belongs in a government building or military facility.

July 20, 20263 min readRead