The construction industry is increasingly seeking ways to reduce the environmental impact of its materials, and architectural glass is a key part of this discussion. Glass production is energy-intensive and finished glass products continue to influence a building’s energy consumption throughout their entire lifecycle. The good news is that there are many effective ways to reduce emissions — and several of them are already available today.
Lower-emission float glass significantly reduces greenhouse gas emissions
One of the most effective steps is to start with the material itself. Since float glass manufacturing requires a great amount of energy, the EPD value of the glass plays a major role in its environmental footprint. Differences between manufacturers are substantial.
Euroglas float glass, represented by Treglas, has the lowest carbon footprint in its entire product category. This is not a limited “low-carbon” niche product, but rather the performance level of the entire product family —with no premium pricing or volume restrictions. For comparison, the greenhouse gas emissions from one major competitor’s float glass are more than 23.5% higher than Euroglas’.
To illustrate the impact: for a mid-sized insulating glass manufacturer with an annual volume of roughly 200 truckloads, the emissions difference amounts to 1447 tonnes of CO₂-equivalent. That corresponds approximately to 1,5 million kilometres driven by a 40-tonne diesel truck. In other words, a Euroglas customer can ship float glass from the factory and distribute finished units to their clients with full confidence — and remain on the sustainable side. A true win-win scenario.
Recycled glass improves efficiency and cuts emissions
Cullet melts at a significantly lower temperature than virgin raw materials, creating meaningful benefits:
• 20–30% energy savings in the melting stage
• reduced need for natural resources
• a lower CO₂ footprint per produced tonne of glass
Recycling works best when the glass manufacturer provides a systematic collection and return model — ideally taking cullet directly from the customer’s production lines back into the furnace. Treglas supports customers in adopting circular solutions. Returned cullet is compensated financially, and the recycled amount can be deducted in EPD calculations. A clear, well-managed system is both economically and environmentally the right choice.
Figure 3. Up to 6 tonnes of glass cullet can be returned at once to the Euroglas float plant by innen-loader.
Choosing the right glass improves building energy efficiency
A major portion of glass’s carbon footprint is generated during the building’s operational phase. Therefore, choosing the correct glass type — whether low-e coatings, solar control, IGU configurations, or vacuum glass — directly influences heating and cooling demand.
Energy efficiency is never a single choice but a combination of layers and coatings, each playing a specific role in the overall performance.
Conclusion
The carbon footprint of architectural glass can be significantly reduced by evaluating the entire value chain — from raw materials and production methods to processing technologies and building-level energy performance.
Treglas Oy’s mission is to help customers make choices that strengthen both business profitability and environmental responsibility — without compromising quality.