Continental Europe - EN

Thermal Insulation

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Performance and energy efficiency

Understand how glass can influence a building's energy and acoustic performance

Applications of glass

Whether you need glass for facades, interiors, homes, or specific applications, we have a solution

Which glass is right

See how the right glass can help improve your quality of life and the beauty of your home

Understand glass

Learn more about glass and what you can do with it.

Design with glass

There’s almost no limit to what you can create with glass.

Build with glass

Glass is the ultimate building element, and can be tailored to each project.

Glass for your home

We’re helping glass inspire more homes than ever before.

BNL-BNP Paribas

Due to the clever structural glazing, the aesthetics are visually appealing, reflecting the building’s surroundings on all sides.

cube berlin

Architects 3XN have created deliberate geometric transformations that create a prismatic pattern of triangular surface reliefs.


Nobu Hotel Warsaw embraces the city’s charisma to create a genuinely unique, stunning structure in this cultural hub.

Our story

Just as we were in 1932, we're ready to meet the challenges of now and the future


Find out more about how glass can support sustainable design

Quality control

We strive for quality in everything we do

Our company

Learn more about who we are

Help and contact

Glass Analytics

Access our comprehensive suite of engineering and analytical tools

BIM objects

Download and use our standardized Guardian BIM content to create project specific BIM files

Seminars and online learning

For anyone who is interested in learning more about glass and its use

Thermal insulation

It’s all about U

That’s U for U-value, or how the thermal insulation performance of a glass is measured. Guardian Glass offers a wide variety of solutions to help improve the energy efficiency of homes. 

A glass solution for your climate 

Windows allow you to connect to the outside world and benefit from the natural daylight. But if they are not performant, they can lead to excessive heat loss during the winter or heat gain during the summer. Glass represents around 80 percent of a window. Choosing the most adapted to your needs can contribute to creating a comfortable indoor environment while consuming the energy responsibly.

How does thermal insulation work? 

A very thin, transparent, and permanent coating is applied on the glass during its manufacturing process to provide it with insulating properties. The glass is then used in a double or triple insulating glass unit to achieve excellent thermal insulation. Depending on your requirements, it can help lower the demand on the air conditioning or on the heating system – or both!

Our thermal insulation glass solutions