Discover all the eco-benefits of glazing

Life Cycle Assessments give us some really interesting results about our glass.

Energy: glass gives more than it takes

As glass manufacturing requires energy to heat the furnace and produce soda-ash, it consequently emits CO2. But when we look at the savings made during the total lifetime of double glazing (SGG Climaplus), thanks to its thermal performance in comparison with single-pane windows, the results are amazing.

Consumption and savings for a house with 100 m2 and 15 m2 of SGG CLIMAPLUS in France

Over 30 years, more than 128 times the quantity of energy required to produce the double glazing can be saved (compared to single-pane glazing).
Calculate your own energy, CO2 and money savings with the SGG Glass Compass (

Transparency: glass brings natural light

Daylight is an essential part of human well-being. As a transparent medium, glass lets natural light penetrate to the heart of a building and provides an opening to the world outside. It is essential for our comfort. But it is also really important when talking about energy savings. Natural light is free, whereas electric lighting costs energy, CO2 and money.

Waste: glass is 100% recyclableWaste: glass is 100% recyclable


Currently, on average 30% of the total weight of a sheet of glass made by Saint-Gobain Glass comes from recycled internal cullet and “pre-customer” cullet.
There are 3 types of cullet, depending on their origin:
  • Internal cullet: broken glass coming from manufacturing glass, reintroduced into the original process
  • “Pre-customer” cullet: broken glass coming from processing, before implementing the finished product.
  • “Post-consumer” cullet: broken glass coming from the end-of-life disposal stage, after collection, sorting and treatment.
More than 1 500 000 tons of cullet are melted each year in 36 furnaces. This enables:
  • A reduction of 1 800 000 tons of raw materials (natural resources) consumed,
  • A reduction of at least 375 000 tons of CO2 emitted, which results in significantly capping the greenhouse effect caused by greenhouse gas emissions.
Indoor air quality: glass, a healthy material Indoor air quality: glass, a healthy material

Glass is an inert material. No emissions released in the air, no leaching…

What about coatings, sealants, mirrors…? All the results are categorical: our products emit very low quantities of Volatile Organic Compounds (chemicals that spread in the air and have a direct impact on human health, some beingeven toxic or carcinogenic). Our glazing allows us to live in a perfectly healthy environment.

  © Saint-Gobain Glass