Learn how EN 356 glass is tested using steel ball drop and axe attack methods, and what these tests mean for security glazing performance.
EN 356 glass testing is used to measure how well security glass resists impact and manual attack.
The standard classifies glass from P1A to P8B, helping architects, contractors and security consultants choose the correct level of protection for a project.
EN 356 testing is commonly associated with anti-bandit glass, anti-vandal glass and laminated security glass.
It provides a recognised way to assess how the glazing performs when exposed to heavy impacts or tool-based attacks.
As experienced security glass manufacturers in the UK, Tecdur designs and manufactures Tecdur Secure Glass —
a high-performance laminated glass range engineered to withstand severe levels of manual attack and certified to EN 356 and LPS 1270 standards.
What Is EN 356 Testing?
EN 356 is a European standard that tests the resistance of glass to manual attack.
Rather than relying on thickness alone, it measures how well the glass performs under controlled impact conditions.
The test method depends on the classification being targeted.
Lower classifications use a steel ball drop test, while higher classifications use an axe attack test.
Steel Ball Drop Testing: P1A to P5A
EN 356 ratings from P1A to P5A are tested using a heavy steel ball dropped repeatedly onto the glass from a defined height.
This simulates impact from heavy objects and helps determine whether the glass can resist penetration.
These classifications are often used where the main risk is impact, vandalism or opportunistic attack.
- P1A – entry-level impact resistance
- P2A – improved resistance to repeated impact
- P3A – moderate protection against impact and vandalism
- P4A – higher impact resistance for exposed areas
- P5A – strong impact resistance before axe-tested levels
Axe Attack Testing: P6B to P8B
EN 356 ratings from P6B to P8B are tested using repeated axe strikes.
This is designed to simulate a more determined attempt to break through the glazing using tools.
The purpose of the test is to measure how many strikes are required before an aperture can be created in the glass.
This makes the P6B to P8B classifications suitable for environments where forced entry or sustained manual attack is a credible risk.
- P6B – approximately 30 to 50 axe strikes
- P7B – approximately 51 to 70 axe strikes
- P8B – more than 70 axe strikes
Why EN 356 Testing Matters
EN 356 testing provides a standardised way to compare security glazing products.
Without certified testing, it would be difficult to know whether glass can genuinely resist impact or manual attack in real-world conditions.
The test results help specifiers choose the correct glass for the risk level of the building.
Lower ratings may be suitable for vandal resistance, while higher ratings are required for more demanding security environments.
Where EN 356 Tested Glass Is Used
EN 356 tested glass is used in buildings where glazing needs to act as part of the first line of defence.
- High value retail storefronts
- Commercial buildings and reception areas
- Security doors and glazed screens
- VIP protection environments
- Prisons and police custody suites
- Mental health establishments
- High security facilities
EN 356 and LPS 1270
EN 356 is an important standard for impact and manual attack resistance.
However, some projects may also require LPS 1270, which tests security glazing using more realistic attack methods and tool sets.
Tecdur Secure Glass can be specified to EN 356 and LPS 1270, helping project teams select a glazing system aligned with the real threat profile of the building.
Secure Glass can be:
Enhance Security
Impact Resistant
Bullet Resistant
Blast Resistant
Fire Resistant
Acoustic
Why Choose Tecdur?
With over 15 years of industry experience and extensive in-house manufacturing capability, Tecdur provides certified, high-performance security glazing designed to protect people and property.
Our team works closely with architects, contractors and specifiers to ensure the correct EN 356 glass rating is selected for each project.
Whether you require P1A impact resistance, P6B axe attack resistance or a higher-rated security glazing system, Tecdur can help you specify the right tested solution.