United Kingdom & Ireland - EN

Thermal Insulation

logo check
What's your challenge?
Design with glass

From anti-reflection to color tints, modern glass enhances design in many ways.

Build with glass

Whatever the construction challenge, we have the glass to help meet it.

Glass for your home

See how the correct choice of glass can help transform a home – and even our wellbeing.

122 Leadenhall - 'The Cheesegrater'

The 75,000 square metres façade features a curtain wall that is double glazed to allow for a high solar protection on neutral-looking glass.

Fruit and Wool Exchange

The new-build façades are predominately brick-faced, with punched windows to reflect the surrounding context.

Caudwell International

Curved glass, punch windows and precast stone panels make up the envelope on a figure-of-eight footprint.

All our projects

From landmark construction projects to innovative residential builds, this is how our glass can make the difference.

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