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What is laminated glass?

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Laminated glass

A safer solution for today's demanding building projects

Laminated glass provides higher mechanical resistance and security benefits

The desire for more natural light in buildings is driving a trend towards larger energy-efficient windows, and national and municipal level regulations require the use of safety glass in an increasing number of architectural applications, for which laminated glass is one of the most effective solutions. A greater demand for noise reduction in both residential and commercial builds, gives rise to increased use of acoustic laminated glass.

What is laminated glass and how is it made?

Laminated glass is two or more lites of glass permanently bonded together with one or more polymer interlayers using heat and pressure. The glass and interlayers are available in a variety of colors and thicknesses which provide the desired appearance and performance to meet the relevant building code standards and customer requirements. 

While float glass provides an excellent base product, laminating the glass can add other properties and benefits such as safety and security, sound control, UV protection, and color. Laminated glass products make float glass suitable for today’s demanding architectural applications such as: noise reduction, blast mitigation, forced entry, protection from broken glass – or a combination of these. 

What are the benefits of laminated glass?

Laminated glazing can be adapted to suit many architectural projects, particularly those that require demanding performance in terms of increased safety, security (impact resistant glass), UV protection, noise reduction or a combination of these – while strongly considering the aesthetics, architects desire.

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Safety and reduced risk of injury

Glass is often  laminated to protect people from glass breakage. Laminated safety glass can be used in many different ways to provide increased safety and security.

Under sufficient impact force, laminated glass will break. Glass fragments  tend to adhere to the plastic interlayer and remain largely intact, reducing the risk of injury. This is particularly important when there is a risk of broken glass falling from high-rise buildings, or from overhead applications such as roof glazing, canopies and skylights. In hurricane-resistant applications, the glass can help prevent water and air from entering the building.

Laminated glass is considered as “safety glass” when it meets the requirements of the various code organizations that set standards for safety.

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Control of noise pollution

Acoustic laminated glass adds noise reduction to other benefits of laminated glass, helping to reduce noise levels so that people can be more comfortable in their living and work spaces.

The acoustic performance of glazing is expressed using the weighted sound reduction index Rw, expressed in decibel (dB). In the final acoustic estimation, other two factors are included: 

  • C, represents the correction factors for medium to high frequencies such as radio, TV, etc 
  • Ctr, represents the correction factor for lower frequencies noise sources such as trains and  automobiles. 

Specificly designed acoustic interlayers reduce vibrations and significantly improve the sound insulation compared to float glass or even standard laminated glass. 

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Solution for your security concerns

Heat strengthened and tempered glass can be incorporated into laminated glass units to further strengthen the impact resistance.  This type of laminated glass is often specified for applications where anti-intrusion or forced-entry security are concerns, ballistic and blast mitigation, and hail protection.

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UV protection properties

When architects require plenty of natural daylight to enter a building without damaging interior furnishings and fittings – laminated glass can absorb up to 99% of the damaging UV rays which can be responsible for up to 50% of fading This protection means that interior surfaces and furniture are likely to last longer.

Endless aesthetic options

Every glass project is unique and so the desired color, light transmission and privacy varies. Using laminated glass for a project doesn’t mean you have to sacrifice on its appearance. Laminated glass offers a wide range of colored PVB interlayer options, which can be combined or used separately, resulting in a choice of over 3,000 transparent, translucent or opaque color options.

How do we describe laminated glass thickness?

The nomenclature for laminated glass describes its build-up by considering the number and thickness of the glass panes used and the thickness of the interlayers.

Example: Laminated glass 33.4

laminated glass illustration

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Guardian Glass offers you a wealth of technical notes, tools and online learning to enhance your knowledge about glass and help you specify the most appropriate architectural glazing for your project. Connect to the Resource Hub to learn more!

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What is laminated glass used for? 

Laminated glass can be used for aesthetic reasons when you wish to add color to a façade while maintaining its transparency. However, it is primarily used for safety or structural reasons. 

Laminated glass can be particularly beneficial when you need to reinforce protection from forced entry, blasts, bullet-resistance, as well as for floor-to-ceiling glazing that prevents people from falling outside. For structural reasons, it is specified for skylights, canopies, balustrades, point-supported facades, and walk-on-glass.  

In urban areas, acoustic laminated glass may be specified for  projects where the surrounding areas are particularly noisy. In addition to exterior applications, laminated glass can also be used on interior glazing to reduce noise from one room to another.  

Laminated glass can be coated with a high-performance coating to enhance both thermal insulation or solar control providing an almost endless variety of options to suit your performance requirements. 

Our Laminated Glass Ranges

  • Guardian LamiGlass® Acoustic

    Guardian LamiGlass® Acoustic

    Guardian LamiGlass® Acoustic is a laminated glass with an advanced interlayer that delivers significantly improved sound insulation compared to standard laminated glass.

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  • Guardian LamiGlass® Color

    Guardian LamiGlass® Color

    Guardian LamiGlass® Color is a laminated glass that features a colored PVB interlayer. This means that not only does it help protect and secure it brings an enhanced aesthetic appeal to every project.

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  • Guardian LamiGlass® ExtraClear

    Guardian LamiGlass® ExtraClear

    Guardian LamiGlass® is a laminated glass made of two or more panes bonded together with clear PVB interlayers. By using different glass types, and varying the number of interlayers, it can deliver a wide range of performance benefits.

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  • Guardian LamiGlass® UltraClear®

    Guardian LamiGlass® UltraClear®

    Guardian UltraClear® LamiGlass™ Neutral glass, with Saflex® Crystal Clear PVB, is unlike any other laminated, low-iron safety glass. With exceptional neutrality and transparency, it has an aesthetic appeal very close to monolithic Guardian UltraClear – regardless of the viewing angle.

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  • Guardian Bird1st™

    Guardian Bird1st™

    Guardian Bird1st™ helps to prevent birds from colliding with buildings – by featuring striking and highly visible patterns to birds, while remaining discreet to humans.

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Applications where laminated glass can be used

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