Technological Innovation

What are the 2 Types of Fire Rated Glass?

Fire rated glass is an essential component in building safety, providing passive protection against the spread of fire. It is designed to resist high temperatures and prevent flames, smoke, and toxic gases from passing through. There are two main types of fire rated glass: tempered glass and laminated glass. Each has its own unique properties and applications.

Tempered Glass

Tempered glass, also known as toughened glass, is widely used in fire rated applications due to its strength and durability. It is made by heating regular glass to a high temperature and then rapidly cooling it, creating internal stress that gives it increased strength.

One of the key advantages of tempered glass is its ability to withstand high temperatures. It can endure temperatures of up to 470°C (878°F) for a specified period, which makes it suitable for use in areas where fire resistance is required, such as doors, windows, and partitions. During a fire, tempered glass acts as a barrier, preventing the passage of flames and smoke.

In addition to its fire resistance, tempered glass is also highly resistant to thermal stress, making it less likely to break upon exposure to sudden temperature changes. When it does break, it shatters into small blunt pieces, reducing the risk of injury compared to ordinary glass.

Laminated Glass

Laminated glass is another commonly used fire rated glass option. It consists of two or more layers of glass bonded together with an interlayer of a transparent material, usually polyvinyl butyral (PVB).

The interlayer not only holds the glass together when broken but also provides fire resistance. In the event of a fire, the interlayer acts as a barrier, preventing the passage of flames, smoke, and toxic gases. This property makes laminated glass ideal for use in fire-resistant doors, windows, and other building applications.

Another advantage of laminated glass is its sound insulation properties. The interlayer helps to reduce noise transmission, making it suitable for areas where acoustic control is important.


In conclusion, the two main types of fire rated glass are tempered glass and laminated glass. Tempered glass offers high strength and can withstand high temperatures, making it suitable for various fire-rated applications. On the other hand, laminated glass provides both fire resistance and sound insulation capabilities. Both types of fire rated glass play a crucial role in enhancing building safety and protecting lives and properties during a fire.



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