Glass Forever – Sternfenster: Transforming Waste Recycling

gf solid green 2025

Based in Lincoln, Sternfenster is a family-owned company specialising in the manufacture and installation of PVCu and aluminium doors, windows, and conservatories. Sustainability lies at the heart of operations for Sternfenster, evident through initiatives such as a fully electric vehicle fleet for the sales team and the installation of solar panels at their cutting-edge 110,000-square-foot factory. These panels contribute to 30% of the factory’s electricity usage, positively contributing to the company’s carbon emissions targets.

Diverting glass from landfill

During a glass networking event, Einars Kalva, Glass Production and Stores Manager at Sternfenster met Lee Glover, Sustainability and Net Zero Delivery Manager at Saint-Gobain Glass. Discussing the benefits and process of enhancing their glass recycling eorts with Glass Forever, a collaborative consultation resulted in Sternfenster positioning itself favourably to ensure that all glass supplied by Saint-Gobain Glass will either be incorporated into an end product or returned to Eggborough as cullet for recycling.

An essential aspect of this recycling initiative at Sternfenster is the inclusion of both pre-and post- consumer cullet being returned to the Saint-Gobain Glass plant in Eggborough, Yorkshire. This means that waste material from the production process and glass removed from residential properties during renovation and improvement works will be collected and remanufactured into new, high-performing glass.

Einars Kalva, Speaking on the Collaboration: “We’re really excited for Glass Forever and the opportunities this presents. Not only will we be able to advance our recycling practices through this programme, but we are also moving into a position to support our customers with glass collections that would have otherwise ended up in landfills. The collaborative nature of Sternfenster and Saint-Gobain Glass has facilitated a comfortable synergy and process that benefits our companies, the circular economy, and the environment.”

Other case studies you might like

McLaren Getjar deconstruction cullet
the macallan distillery 059 banner
Spring Gardens facade
img 3293
img 0285
img 3309

Glass Forever – McLaren Construction: A Circular Economy

McLaren has worked with Getjar, a specialist, construction company, to recover the post-consumer glass from a project in London that was undergoing refurbishment. The project is an excellent example of a circular economy for glass, as the glass taken from the building will be remanufactured by Saint-Gobain Glass into new, high-performance, flat glass, products. When complete, the refurbished building will be a net-zero building.

img 5182
img 5190
img 6691

Glass Forever – General Demolition: Building a Sustainable Future

Established in the mid-1970s, General Demolition provides deconstruction and enabling works across London and the home counties. The company’s expertise encompasses strip-out, cut-and-carve, and total demolition works in and around central London. With a recycling heritage exceeding 30 years, notably at their Walton on Thames site, General Demolition is richly poised for continued growth, having achieved an increased turnover of £15 million in 2024.

020 heartspace
033 heartspace
042 heartspace
072 heartspace
121 heartspace
140 heartspace

Heartspace University of Sheffield

The award-winning Faculty of Engineering at the University of Sheffield has earned prominent recognition in the UK. Drawing students and companies from around the world, it stands as a vibrant hub for idea exchange and pioneering solutions. At the heart of the University lies Heartspace, an architectural marvel that seamlessly brings together ultra-modern laboratories, offices, and social spaces, nestled between two historic buildings beneath an impressive glass roof.