Learn what EN 356 P1A to P5A glass ratings mean, how steel ball drop testing works, and where impact-resistant security glazing is typically used.
EN 356 P1A to P5A glass refers to the lower classification range within the EN 356 security glazing standard.
These ratings measure how well glass resists impact from a heavy steel ball, making them particularly relevant for anti-vandal glass, anti-bandit glass and impact-resistant glazing applications.
P1A to P5A ratings are commonly specified where the primary risk is vandalism, accidental impact or opportunistic attack rather than sustained tool-based intrusion.
The higher the rating, the greater the glass resistance to repeated impact.
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 recognised standards including EN 356 and LPS 1270.
What Are P1A to P5A Ratings?
P1A to P5A are EN 356 classifications used to measure impact resistance.
Unlike P6B to P8B, which are tested using axe strikes, P1A to P5A ratings are tested using a heavy steel ball dropped onto the glass from a specified height.
These ratings indicate how well the glass can resist penetration from repeated impacts.
They are typically used to assess protection against thrown objects, vandalism and opportunistic attempts to damage glazing.
How Is P1A to P5A Glass Tested?
EN 356 P1A to P5A glass is tested using a steel ball drop test.
During the test, a heavy steel ball is dropped repeatedly onto the glass from a defined height.
The glass must resist penetration to achieve the required classification.
As the rating increases, the test becomes more demanding.
Higher classifications require the glass to withstand more impact energy before failure.
P1A to P5A Ratings Explained
Each rating in the P1A to P5A range represents a different level of impact resistance.
While all are tested using the steel ball drop method, higher ratings provide increased protection.
- P1A – entry-level impact resistance for lower-risk applications
- P2A – improved resistance to repeated impact
- P3A – moderate protection against impact and vandalism
- P4A – higher resistance for more exposed or vulnerable locations
- P5A – strong impact resistance before moving into axe-tested classifications
Where Is P1A to P5A Glass Used?
EN 356 P1A to P5A glass is commonly used where glazing needs enhanced resistance to impact, but where the level of threat does not require axe-tested P6B to P8B protection.
- Retail storefronts and display windows
- Commercial building entrances
- Office glazing and reception areas
- Public buildings and transport environments
- Schools, healthcare buildings and exposed glazing areas
- Internal screens and glazed partitions
P1A to P5A vs P6B to P8B
The key difference between P1A to P5A and P6B to P8B is the test method and the level of attack resistance.
P1A to P5A ratings focus on impact resistance, while P6B to P8B ratings are designed to resist sustained manual attack using tools.
- P1A to P5A – steel ball drop testing for impact resistance
- P6B to P8B – axe attack testing for higher security applications
Choosing the correct rating depends on the risk profile of the building, the value of the assets being protected and any insurance or regulatory requirements.
Why Certified Impact Resistance Matters
Certified EN 356 ratings provide reassurance that the glass has been tested under controlled conditions.
This helps specifiers avoid relying on glass thickness alone and instead select glazing based on proven performance.
For projects where vandalism or impact risk is a concern, P1A to P5A glass can provide an effective balance of protection, practicality and cost efficiency.
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, P5A protection or a higher-rated security glazing system, Tecdur can help you specify the right tested solution.