How thick is hurricane proof glass

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In recent years, the frequency and intensity of hurricanes have increased significantly. As a result, there has been a growing interest in the development of hurricane-proof glass to protect buildings and homes in hurricane-prone areas. This article aims to explore the concept of hurricane-proof glass and delve into its thickness, which plays a crucial role in determining its effectiveness in withstanding the powerful forces of a hurricane.

Understanding Hurricane-Proof Glass

Hurricane-proof glass, also known as impact-resistant or storm-resistant glass, is designed to withstand the high winds, flying debris, and substantial pressure changes that occur during a hurricane or severe storm. It is a laminated glass that consists of multiple layers of glass and a polymer interlayer, usually made of polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA).

The combination of these layers helps to reinforce the glass, preventing it from shattering or breaking into dangerous shards. In the event of an impact, the interlayer holds the glass fragments together, maintaining the structural integrity of the window or door. This not only protects the occupants inside but also prevents the entry of wind and water, minimizing damage to the structure.

The Importance of Thickness

The thickness of hurricane-proof glass is a critical factor in determining its strength and ability to withstand the forces of a hurricane. Typically, hurricane-proof glass comes in various thicknesses, ranging from 7/16 to 1 inch (11 to 25 millimeters). The required thickness depends on the location of the building, the wind speeds it may encounter, and the building codes and regulations in that particular area.

Thicker glass generally offers higher resistance to impact, making it suitable for areas prone to extreme weather conditions. However, it is worth noting that thicker glass does not necessarily guarantee absolute protection against hurricanes. Other factors, such as the frame or mounting system, play a significant role in the overall performance of hurricane-proof glass.

Testing and Certification

Before hurricane-proof glass is deemed suitable for use in hurricane-prone areas, it must undergo rigorous testing to ensure its compliance with various national and international standards. These standards evaluate the glass's ability to resist wind pressure, impact from debris, and cyclic pressure changes that simulate the conditions experienced during a hurricane.

The most widely recognized standard for testing hurricane-proof glass is the ASTM E1996 Standard Specification for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Windborne Debris in Hurricanes. This standard classifies glass into various levels, such as Small Missile Level D, Large Missile Level E, and Large Missile Level F, depending on their resistance to different sizes of projectiles.


In conclusion, hurricane-proof glass is a valuable solution to protect buildings and homes in hurricane-prone areas. The thickness of the glass is a crucial factor in determining its ability to withstand the forces of a hurricane, with thicker glass generally providing greater resistance to impact. However, it is essential to consider other factors, such as the frame and mounting system, and ensure that the glass meets the necessary testing and certification standards. By incorporating hurricane-proof glass into construction, we can enhance the safety and resilience of structures in the face of increasingly severe weather events.


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