Laminated glass thickness is an important factor when selecting safety glass for architectural projects. The right glass configuration affects not only safety performance, but also structural requirements, sound insulation, durability, and overall project suitability. Unlike monolithic glass, laminated glass is made by bonding two or more glass layers with an interlayer, usually PVB (Polyvinyl Butyral), EVA (Ethylene Vinyl Acetate), or SGP (SentryGlas®). The final performance depends on the combination of glass thickness, interlayer thickness, and application requirements.

Therefore, this article explains how laminated glass thickness is calculated and how to select the right configuration for different applications, helping architects, contractors, and buyers make more informed decisions when specifying laminated glass.

1. What Does Laminated Glass Thickness Mean?

Basic Structure of Laminated Glass

Laminated glass thickness refers to the total thickness of the complete glass assembly, including the glass layers and the interlayer.

The basic structure is:

Glass layer + Interlayer + Glass layer = Total laminated glass thickness

For example:

6.38mm laminated glass = 3mm glass + 0.38mm PVB interlayer + 3mm glass

The interlayer remains between the glass sheets after lamination, helping hold the glass together if breakage occurs while also improving safety, acoustic performance, and other functional properties.

When specifying laminated glass, the total thickness alone is not enough. The glass type, interlayer thickness, glass size, and installation conditions should all be considered.

2. Common Laminated Glass Thickness Options

Architectural laminated glass is available in various thickness combinations to meet different safety and performance requirements. The following configurations are commonly used in building applications:

As a laminated glass manufacturer, Reach Building supports customized glass configurations based on different project requirements, including glass thickness, interlayer options, and application conditions.

3. How to Choose Laminated Glass Thickness by Application

The suitable laminated glass thickness depends on the application, glass size, support condition, and required safety performance. The following configurations represent commonly used options for architectural projects, while the final specification should always be confirmed according to project requirements and local standards.

Balcony Railings

For balcony railings and glass balustrades, laminated glass is widely selected because the interlayer helps retain broken glass and maintain panel integrity after breakage.

Common thickness options include:

• 8.76mm laminated glass (4mm + 0.76mm PVB + 4mm)
  Suitable for many framed balcony railing applications and general residential projects.

• 10.76mm laminated glass (5mm + 0.76mm PVB + 5mm)
  Commonly used where higher strength or larger glass panels are required.

• 13.52mm laminated glass (6mm + 1.52mm PVB + 6mm)
  Often selected for higher safety requirements, larger panels, or demanding commercial applications.

Since every project has different panel sizes, installation methods, and performance requirements, the ideal laminated glass configuration may vary accordingly. Working with an experienced glass supplier helps ensure the selected glass structure meets both application needs and safety expectations. Reach Building supplies laminated glass solutions manufactured in accordance with recognized safety glazing standards, including ASTM C1172 in North America and EN 14449 in Europe.

Balcony railing projects require careful consideration of glass configuration, installation methods, and applicable safety standards. For more details, read our guide: Glass Balcony Safety Standards: Tempered Vs. Laminated Glass Explained

Skylights and Overhead Glazing

Because skylights are installed above people, laminated glass is commonly used to improve safety after breakage.

Typical configurations include:

• 8.76mm–10.76mm laminated glass
  Common for smaller skylights and applications with moderate loading requirements.

• 11.52mm–13.52mm laminated glass
  Often selected for larger skylights, commercial buildings, or projects requiring higher safety performance.

For larger spans, exposed locations, or special loading conditions, thicker laminated glass combinations may be required.

Important selection factors include:

• Glass span and dimensions

• Wind and weather conditions

• Support structure

• Impact resistance requirements

Curtain Walls and Facades

For exterior facades, laminated glass thickness is usually determined by structural performance, glass size, and building requirements.

Common configurations include:

• 11.52mm laminated glass (6mm + 0.76mm PVB + 6mm)
  Frequently used for general commercial glazing applications.

• 13.52mm laminated glass (6mm + 1.52mm PVB + 6mm)
  Suitable for applications requiring enhanced safety, acoustic performance, or larger glass panels.

• 17.52mm and above
  Used for larger panels, higher structural requirements, or special architectural designs.

For curtain wall systems, laminated glass is also often combined with insulated glass units (IGU) and Low-E coatings to improve energy efficiency and solar control.

Doors and Partitions

Interior applications usually require a balance between safety, appearance, and acoustic performance.

Common options include:

• 6.38mm laminated glass
  Suitable for interior partitions, office areas, and standard glass doors.

• 8.76mm–10.76mm laminated glass
  Common for larger doors, higher traffic areas, and applications requiring improved durability or sound control.

• 13.52mm laminated glass
  Used for larger frameless doors, premium partitions, or projects with higher acoustic requirements.

The ideal thickness depends on door size, hardware system, frequency of use, and design requirements.

4. Does Thicker Laminated Glass Always Mean Better Performance?

Not necessarily.

A thicker laminated glass panel does not automatically provide better performance in every situation. The final performance depends on the combination of:

• Glass thickness

• Glass type (annealed, heat strengthened, or tempered)

• Interlayer type and thickness

• Installation conditions

• Required performance standards

For example, increasing the interlayer thickness can improve safety retention and acoustic performance, while increasing the glass thickness can improve load-bearing capability. The right laminated glass specification is always a balance between performance requirements, project conditions, and cost considerations.

5. Beyond Glass Thickness: The Importance of Interlayer Selection

While glass thickness is an important factor in laminated glass selection, the interlayer is another key component that affects overall performance. Many buyers focus only on the glass thickness, but the interlayer also affects the overall performance of laminated glass.

For example:

• A thicker glass layer can improve structural strength and load resistance.

• A thicker interlayer can improve safety retention, sound insulation, and specific performance requirements.

Different interlayer thicknesses are commonly used for different applications:

Different interlayer materials offer different performance characteristics depending on the application requirements. Learn more about the differences between SGP and PVB interlayers and how to choose the right option for your project.

Therefore, when selecting laminated glass, it is important to evaluate the complete glass structure rather than only the total thickness.

6. How to Select the Right Laminated Glass Thickness from a Manufacturer

When requesting a laminated glass quotation, providing complete project information helps manufacturers recommend the right specification.

Important information includes:

Application

Specify the intended application, such as balcony railings, curtain walls, skylights, doors, partitions, or other architectural uses.

Glass Size

Provide the glass dimensions, quantity, and any customized panel shapes, as larger glass panels usually require different considerations compared with smaller sizes.

Installation Method

Share the installation method, including whether the glass will be used in a framed system, four-side supported system, or frameless system, as the support structure affects the glass requirements.

Performance Requirements

Include any required performance targets, such as safety requirements, acoustic performance, wind load resistance, or compliance with local standards.

Start with the Right Glass Supplier at the Design Stage

Selecting the right glass specification at the design stage is essential for avoiding costly adjustments later in the project. Working with an experienced glass supplier early can help ensure the selected laminated glass structure meets safety, performance, and installation requirements.

Reach Building supports customers with laminated glass configuration advice, technical coordination, and customized glass solutions to help simplify project planning and improve execution efficiency.

Conclusion

The right laminated glass specification is determined by the relationship between glass thickness, interlayer selection, and the requirements of the application.By considering the complete laminated glass structure and working with an experienced supplier during the design stage, project teams can reduce specification risks and achieve a more suitable solution for their building requirements.

Reach Building provides customized laminated glass solutions for architectural applications, supporting different glass configurations, interlayer options, sizes, and processing requirements. Our team works with project partners to help evaluate suitable glass structures and provide reliable solutions for different building needs. Start your laminated glass project with Reach Building today!

FAQ

What is the most common laminated glass thickness?

6.38mm laminated glass is one of the commonly used options for general safety glazing applications. Thicker configurations such as 8.76mm, 10.76mm, and 13.52mm are often selected for projects requiring higher safety or performance levels.

Is thicker laminated glass safer?

Thicker laminated glass can provide higher strength and performance, but safety depends on the complete glass structure, including glass type, interlayer thickness, and installation conditions.

What is 6.38mm laminated glass used for?

6.38mm laminated glass is commonly used for interior partitions, doors, and general safety glazing applications where basic safety performance is required.

How is laminated glass thickness calculated?

Laminated glass thickness is calculated by adding the thickness of the glass layers and the interlayer.

For example: 5mm glass + 0.76mm PVB + 5mm glass = 10.76mm laminated glass