Float Glass vs. Duplex -Laminated Glass: Advantages and Applications in Interior Design

When it comes to interior design, selecting the right materials is essential for achieving both aesthetic appeal and functionality. Float glass and laminated glass are two popular options, each offering unique characteristics that make them suitable for different applications. In this article, we explore the advantages of these glass types and how they can be effectively incorporated into various interior design projects.

What Defines Float Glass vs. Laminated Glass?

Float glass and laminated glass are two widely used types of glass in various interior and exterior design applications, each offering distinct characteristics. 

Production Process: Float Glass vs. Duplex-Laminated Glass

The production methods for these two glass types differ significantly, resulting in unique properties:

• Float glass is manufactured using the float process, where molten glass is poured onto a bed of molten tin, creating a perfectly smooth and uniform surface. At Transparent Design, we offer custom laminating services using high-quality float glass from our suppliers, adapting it to your project’s specific needs.
• Laminated glass, often referred to as duplex glasswhen pre-laminated by major glass manufacturers, consists of two glass sheets bonded with a plastic or resin interlayer. At Transparent Design, we provide cutting and processing services for manufacturer-laminated glass, customizing it according to your project’s requirements. 

Resistance of float glass vs. duplex glass
Duplex glass is a laminated glass made by the glass supplier. It is untempered and consists of two layers of glass bonded together by a plastic layer, usually polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). It can be processed in our factory through cutting, finishing, and CNC processing. Duplex glass cannot be tempered after processing.

Untempered float glass, although it has standard mechanical resistance, can be strengthened through lamination, thus increasing the level of security in case of impact or accident. At Transparent Design, we have the capability to laminate and process float glass. In most cases, float glass is tempered after lamination. 

Clarity of float glass vs. duplex glass
From an optical perspective, unlaminated transparent float glass offers exceptional clarity due to its extremely smooth and uniform surface. It is ideal for applications that require maximum transparency.

Transparent duplex glass may exhibit slight optical distortion or coloring due to the intermediate plastic or resin layer used in the lamination process. However, clarity also depends on the type of float glass used (clear or ultra-clear) and the type of film (transparent or frosted). 

Thickness and weight
Regarding thickness and weight, unlaminated float glass is lighter than duplex glass of the same thickness.
Duplex glass, due to its structure with two layers of glass bonded together with a film, may be slightly heavier and thicker than unlaminated float glass, factors that can influence the choice depending on the needs of the interior design project.

What Advantages Does Float Glass Offer Compared to Duplex-Laminated Glass?

Non-laminated float glass is highly valued for its excellent visual clarity, allowing for high light transmission. This characteristic is particularly useful in spaces where natural light plays a crucial role in creating bright and open environments.

Laminated float glass, on the other hand, combines the visual clarity of float glass with the enhanced safety provided by lamination. In the event of breakage, glass fragments remain adhered to the interlayer, reducing the risk of injury. This feature makes it ideal for spaces where safety is a priority, such as glass railings and glass doors. For example, in commercial spaces, laminated float glass doors are recommended to ensure the safety of customers and staff without compromising aesthetics.

The choice between laminated (duplex) glass and float glass depends on the technical requirements of the project, resistance needs, and safety regulations. Laminated glass is preferred for office facades due to its resistance to wind and pressure, as well as for the safety it provides—if broken, the shards remain attached to the interlayer, preventing injuries. In general, laminated glass is used in applications where higher durability and safety are required, whereas float glass is suitable for other applications where these characteristics are not essential. 

Applications of float glass vs. duplex glass

Float glass and duplex glass offer innovative solutions for interior design, adding elegance and functionality to modern spaces. These materials allow designers to create bright and safe interiors, tailored to contemporary needs.

Applications of float glass
In interior design projects, float glass stands out for its ability to amplify natural light and visually enlarge space. Its applications include:
• interior windows;
• doors;
• walls;
• shelves;
• display cases;
• decorative panels;
• countertops;
• shower cabins;
• indoor staircase balustrades.

Laminated float glass adds an extra layer of safety and elegance to interior design, also being used to create bright and modern spaces. It combines visual clarity with accident protection, offering aesthetic and functional solutions for various design projects. For example:
• staircase and terrace balustrades;
• partition walls;
• sliding doors;
• kitchen countertops;
• store display cases;
• decorative panels;
• glass flooring;
• facades.

Applications of duplex glass
Duplex glass is a reliable material in design. It is used to create open and protected spaces, contributing to a modern and sophisticated design. Examples of applications include:
• indoor staircase balustrades;
• shower doors;
• large interior windows;
• bathroom screens;
• partition walls in open-plan offices;
• balustrades in shopping centers;
• doors;
• information panels.

Choosing between float glass and duplex glass

Both float glass and duplex glass offer advantages in interior design. The choice between these types of glass depends on the specific requirements of the project and the design priorities. You can consider these criteria:

Safety
For example, for a balustrade project in a shopping center, duplex glass would be preferred because, if it breaks, the shards remain trapped in the film that bonds the two layers of glass. In contrast, for interior windows in an office, float glass may be sufficient to provide the necessary safety.

Durability
For example, in a project for a glass roof for a greenhouse, duplex glass would be preferred due to its high resistance to weather conditions and impact. For display windows in an art gallery, non-laminated float glass could be a viable option, offering sufficient durability to protect the exhibits.

Functionality
For example, in a shower cabin design project, laminated float glass could be preferred to ensure both safety and a pleasant aesthetic. For a project to create glass balustrades in a shopping center, duplex glass could be chosen to provide durability and added protection.

Float glass and duplex glass offer various options to enhance the design and functionality of interior spaces. Each type of glass has its own advantages that can be utilized in different ways. Contact us to discover how we can integrate these glass solutions into your business projects!