When it comes to enhancing the security and safety of our living spaces, the choice of glass plays a pivotal role. There are various types of safety glass, each with unique properties and applications. Safety glass has become an essential component in modern architecture and interior design, offering protection against accidental injuries and potential break-ins. In this blog post, we’ll talk you through the differences between toughened vs laminated glass to help you make an informed decision about which type of safety glass is best suited for your specific needs.
The Manufacturing Process of Toughened Glass
Toughened glass, also known as tempered glass, undergoes a unique manufacturing process that significantly enhances its strength and safety properties. The first step in the toughening process involves heating the glass to temperatures approaching its softening point. Once the glass reaches the desired temperature, it is rapidly cooled using high-pressure air jets to create a unique stress profile within the glass.
The result of this process is a glass that is approximately four to five times stronger than standard glass of the same thickness. The increased strength allows toughened glass to withstand greater impacts and temperature differentials. Moreover, when toughened glass breaks, it shatters into small, relatively blunt pieces, significantly reducing the risk of serious injury.
The Production of Laminated Glass
At its core, laminated glass consists of two or more layers of glass bonded together with an interlayer of polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). This sandwich of glass and interlayer is then subjected to heat and pressure.
When laminated glass breaks, the interlayer holds the broken glass pieces in place, preventing them from falling and potentially causing injury. Laminated glass holds the structure together, enhancing safety and security in various applications, such as shop windows and vehicle windscreens.
Key Differences Between Toughened and Laminated Glass
Strength and Impact Resistance
Toughened glass is significantly stronger than standard annealed glass which breaks into larger, jagged pieces when broken, presenting a higher risk of injury.
Laminated glass, while not as strong as toughened glass, offers excellent impact resistance due to its layered structure.
Breakage Pattern
When broken, toughened glass shatters into small, relatively harmless granules.
Laminated glass shatters but remains largely intact, with broken pieces adhering to the interlayer.
Sound Insulation
Laminated glass, especially with specialised acoustic interlayers, provides superior sound insulation compared to toughened glass.
Thermal Resistance
Toughened glass has superior resistance to thermal stress and can withstand higher temperature differentials. Toughened glass is also known as heat resistance glass due to its ability to endure mechanical stress and extreme temperatures.
Laminated glass has moderate thermal resistance, depending on the types of glass used in its construction.
Cost
Generally, toughened glass is less expensive than laminated glass. However, the cost of laminated glass can vary significantly based on the complexity of the interlayer and the number of glass panes used.
Applications of Toughened Glass
Toughened glass is used in a wide range of settings, both residential and commercial. It is particularly important for ground floor glass in domestic and residential buildings, shop fronts, and internal and external doors. Here’s just some of the situations it may be used in.
Architectural Applications
Glass doors in homes and offices frequently utilise toughened glass to prevent injuries from accidental impacts. Interior glass partitions in particular benefit from the strength of toughened glass.
Automotive Industry
Sunroofs in cars also commonly use toughened glass due to its resistance to thermal stress.
Furniture
Toughened glass is a popular choice for dining tables and coffee tables. It is also ideal for shower screens.
Appliances
The high-temperature resistance of toughened glass makes it suitable for appliances such as oven doors.
Public Spaces
The strength and safety features of toughened glass make it suitable for public transportation shelters, such as bus stops.
Balustrades
Glass balustrades in staircases and balconies often use toughened glass for safety.
Marine Applications
Boat windows often use toughened glass due to its resistance to both impacts and thermal stress.
Uses of Laminated Glass
Laminated glass is a great choice for areas where safety, security, and specialised performance are required. Laminated safety glass is widely utilised in construction and automotive applications due to its durability and security features. Let’s take a look.
Architectural Glazing
The ability to hold broken pieces in place makes laminated glass ideal for overhead applications such as roof lights and roof lanterns.
Aviation
Laminated glass is used in airplane windows due to its ability to withstand high pressures and impacts.
Soundproofing
Acoustic laminated glass is used to create sound-insulated environments in schools, offices and other public buildings.
Shops
Laminated glass provides security against theft while maintaining visibility. Laminated glass toughened is particularly suitable for shop windows as it prevents shattering and deters break-ins.
Zoos and Aquariums
Laminated glass provides a safe barrier between animals and visitors. Thick laminated glass is often used in large aquariums.
Making the Right Choice for Your Safety Glass Needs
When making a decision on glass, it’s essential to consider not only the immediate safety requirements but also long-term factors such as maintenance and energy efficiency. Understanding the differences between toughened or laminated glass is crucial for making informed decisions about your safety glass needs.
Whether you’re an architect designing a new building, a homeowner renovating your space, or a business owner upgrading your premises, here at Performance Glass we offer a wide range of safety glass including both toughened and laminated units. Our advanced machinery and skilled workforce helps us to process a variety of glazing products that others on the market simply cannot replicate. To find out more, drop us an email today on theteam@performanceglass.co.uk.