Continental Europe - EN


logo check
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

ClimaGuard Premium2
Harness the sun and its light

Guardian ClimaGuard® Premium2 coated glass for double and triple glazing offers an exceptional level of light transmission, allowing a higher amount of natural daylight into residential applications, reducing the need for artificial lighting. A remarkable 74% of light is transmitted in triple glazing, enabling higher levels of transparency without disruptive reflections. The coated glass also offers high solar heat gain, making it suitable for passive house and low energy constructions. As a universal product for double and triple glazing, logistics is simplified as there is no need for multiple products which means reduced stock and improved logistics for glass producers.

Product information
  • Guardian ExtraClear/4-12 mm
  • Guardian UltraClear/4-12 mm
  • Windows
  • Doors
  • Roofs
Manufacturing options
  • Laminated
  • Annealed
  • Heat Treated for T versions
Recommended Coating Positions
  • Surface 3 (double)
  • Surface 2 & 5 (Triple)
Maximum Size
  • <3210x6000mm
Edge Deletion
  • Yes
Glass type
  • Single Silver Coated Glass
Glass functions
  • Thermal Insulation
Fabrication options
  • Must be used in Insulating Glass Units
  • Neutral

Visual Appearance

Use the glass visualizer to get an introductory understanding of how glass will appear in use. Use the Glass Analytics tools to explore even more options for color and performance.

Choose an option
There is only one substrate available for this product


This tool intended to represent the reflected/transmitted color ; however, glass color cannot be accurately portrayed online. Please see color disclaimer at bottom of the page.

Original Image
Modified Image

You need more information and additional mockups? Consult our Glass Visualizer Tool:

Performance data

The glazing make-up suggestions below are pre-defined to provide examples of commonly used combinations of products. There are many other glass combinations available at Glass Analytics.



GLASS: Guardian ExtraClear (CE) Glass, 4mm

GAP: 10% Air, 90% Argon 16.0mm

GLASS: Guardian ExtraClear (CE) Glass, 4mm (3-ClimaGuard® Premium2 (CE))

Calculated Values are in accordance with EN 410:2011 , EN 673:2011

Performance Values

Visible Light
Transmittance (τv)
81.9 %
Reflectance outside (ρv)
12.4 %
Reflectance inside (ρv)
12.6 %
Colour Rendering Index (Ra)
Transmittance UV(τuv)
36.6 %
Solar Energy
Solar transmittance(τe)
58.0 %
Reflectance outside (ρe)
28.0 %
Solar Factor (SF/g)
63.9 %
Thermal Properties
U-Value (Ug)
1.1 W/m²·K



GLASS: Guardian ExtraClear (CE) Glass, 4mm (2-ClimaGuard® Premium2 (CE))

GAP: 10% Air, 90% Argon 14.0mm

GLASS: Guardian ExtraClear (CE) Glass, 4mm

GAP: 10% Air, 90% Argon 14.0mm

GLASS: Guardian ExtraClear (CE) Glass, 4mm (5-ClimaGuard® Premium2 (CE))

Calculated Values are in accordance with EN 410:2011 , EN 673:2011

Performance Values

Visible Light
Transmittance (τv)
74.1 %
Reflectance outside (ρv)
15.9 %
Reflectance inside (ρv)
15.9 %
Colour Rendering Index (Ra)
Transmittance UV(τuv)
22.1 %
Solar Energy
Solar transmittance(τe)
46.5 %
Reflectance outside (ρe)
32.9 %
Solar Factor (SF/g)
52.7 %
Thermal Properties
U-Value (Ug)
0.6 W/m²·K
Performance Calculations
ClimaGuard Premium2
  • 1 Pane
  • 2 calculation format
  • 3 results
  • 1 Outer Pane
  • 2 Inner Pane
  • 3 cavity
  • 4 calculation format
  • 5 results
  • 1 Outer Pane
  • 2 Middle Pane
  • 3 Inner Pane
  • 4 cavity
  • 5 calculation format
  • 6 results

Choose a glazing

  • Monolithic

    Not available for this product

  • Double

    Not available for this product

  • Triple

    Not available for this product

Outer Pane

There is only one substrate available for this product.
There is only one thickness available, to calculate other thickness' please go to Glass Analytics
There is only one coating available

Choose your calculation format

    There is only one calculation standard available


    Calculated Values are in accordance with

    Performance Values

    Need further technical support? Get in contact

    Submission failed due to a error, please try again
    This tool is unvailable on this device

    Access our website on a bigger device to be able to use our comparison tool.

    Can’t find the glass make-up you are looking for? Go to Glass Analytics for more detailed configurations:

    Find the Guardian Glass supplier nearest you