Glass facade & windows by Saint-Gobain

See below how Glass Facade & Windows by Saint-Gobain can contribute to BREEAM criteria: Reduction of energy use and carbon emissions.

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The number of points is given for only information purpose. Saint-Gobain, in anyway, shall not guarantee or not be held liable for non-fulfillment of the certification which includes a broader package than constructions products employed for the targeted building.
Up to 15 credits (all buildings)

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Key contribution

In promoting sustainable construction, Saint-Gobain offers some of the most advanced, energy-efficient coated glass for facades, skylights and windows, reducing energy demand and, as a consequence, carbon emissions.


To recognise and encourage buildings designed to minimise operational Energy demand, Primary energy consumption and CO₂ emissions.

Requirement summary

This criteria recognizes improvements in the energy performance of the building above national building regulations in relation to heating and cooling energy demand, primary energy consumption and carbon dioxide emissions (using an approved building energy calculation software), Reducing energy demand has to be taken into account from the building design and/or through the systems specification.

Learn more about Reduction of Energy Use and Carbon Emissions

Our contribution

Glazing characteristics can have a direct impact on energy needs and associated CO2 emissions for the three areas of heating, air conditioning and lighting. 

  • For heating, a low emissivity glass (called “low-e”) allows heat to be kept inside the building, while a better glazing thermal insulation (also known as the “Ug value”) can limit heat loss;
  • For air conditioning, the solar factor (called the “g value”) has to be considered; and
  • For lighting, a high light transmission (in %) ensures that natural light enters into the building. 

Glazing properties

To select the most appropriate glazing in terms of energy performance, it is necessary to consider the context of use, i.e. the geometry, window size, orientation and geographical localization of the building. Thanks to our coasted- and insulated glass properties and our performance simulation tools, we can create the optimized glazing for your project.

Below are some examples of glazing configurations and their performances:

Glazing performance

For instance, the new generation of low-e ECLAZ (used in double or triple glazing) positively contributes to the challenge of building energy savings by minimizing heat losses through a low U-value, while providing the highest solar gain and a high light transmittance. Such unequalled solar gains and luminous transmission decrease electricity expenses thanks to the optimized energy balance and natural light gains.