Fit a more energy efficient window With u-values of as low as 0.8W/m2 K
Our energy efficient window and door range from Deceuninck is Part L and Future Homes ready.
Choose your sector
Use our energy saving calculator to find out how much upgrading your windows can save you in the long run.
Using our resources, we are committed to reducing CO2 emissions, U-values and wasted materials our product manufacturing creates. By changing processes within our raw materials, suppliers, manufacturing and distribution stages, we strive to offer homeowners sustainable and eco-friendly products and services.
| Energy consumption |
Usage | CO2 kg | % of Scope 1 and 2 emissions |
Year on year change |
|---|---|---|---|---|
| Electricity (kwh) | 2,303,833 | 489,173 | 41% | -1% |
| Gas (kwh) | 934,317 | 171,130 | 14% | -26% |
| Diesel (Litres) | 180,100 | 452,469 | 38% | -4% |
| TOTAL | 1,11,902 | - | -7% |
We’ve already recorded a 7% reduction in CO2 year on year by manufacturing energy-efficient windows and doors and sourcing sustainable materials.
| Energy consumption |
Usage | CO2 kg | % of Scope 1 and 2 emissions |
Year on year change |
|---|---|---|---|---|
| Electricity (kwh) | 2,303,833 | 489,173 | 41% | -1% |
| Gas (kwh) | 934,317 | 171,130 | 14% | -26% |
| Diesel (Litres) | 180,100 | 452,469 | 38% | -4% |
| TOTAL | 1,11,902 | - | -7% |
Established in 1974, Sternfenster became one of the UK’s largest trade fabricators of uPVC and aluminium windows and doors. Currently run by Mike and Simon Parczuk, the original founders’ sons, we continue to deliver high-quality products nationally but with the values of a family-run business.
We are proud to have 50 years of manufacturing at Sternfenster and are fully committed to UK homeowners and offering sustainable products and services wherever possible. Working closely within the trade and retail industry, we offer nationwide delivery across our comprehensive portfolio.
Being one of the UK’s largest window and door manufacturers, we understand the importance of our role in sustainability. From the products we manufacture to our deliveries, we make it our mission to consistently lead the industry and improve our business sustainability.
At Sternfenster, we recognise our position to support the global fight against climate change. From the products we make and deliver to how we run our business, we constantly look for ways to improve our sustainability and carbon emissions, with a goal of being Net Zero by 2050.
Reducing heat loss – With windows and doors accounting for 18% of heat loss, our range can help homeowners deliver next-generation levels of thermal performance and lower the carbon emissions from UK homes.
Sustainable products – As a prominent manufacturer within the fenestration industry, we understand the importance of making our products more sustainable.
Sustainable energy – By committing to lowering our Scope 1 and 2 emissions, we aim to use less energy and switch to renewable and more sustainable energy sources.
Established in 1974, Sternfenster became one of the UK’s largest trade fabricators of uPVC and aluminium windows and doors. Currently run by Mike and Simon Parczuk, the original founders’ sons, we continue to deliver high-quality products nationally but with the values of a family-run business.
We are proud to have 50 years of manufacturing at Sternfenster and are fully committed to our customers and offering sustainable products and services wherever possible. Working closely within the trade and retail industry, we offer nationwide delivery across our comprehensive portfolio.
Being one of the UK’s largest window and door manufacturers, we understand the importance of our role in sustainability. From the products we manufacture to our deliveries, we make it our mission to consistently lead the industry and improve our business sustainability.
At Sternfenster, we recognise our position to support the global fight against climate change. From the products we make and deliver, to how we run our business, we constantly look for ways to improve our sustainability and carbon emissions, with a goal of being Net Zero by 2050.
Reducing heat loss – With windows and doors accounting for 18% of heat loss, our range can help homeowners deliver next-generation levels of thermal performance and lower the carbon emissions from UK homes.
Sustainable products – As a prominent manufacturer within the fenestration industry, we understand the importance of making our products more sustainable.
Sustainable energy – By committing to lowering our Scope 1 and 2 emissions, we aim to use less energy and switch to renewable and more sustainable energy sources.
At Sternfenster, the environmental impact our manufacturing and installation process provides is something we continue to improve and reduce.
Combined with the impact of our products on the environment and sustainability, we utilise our partnerships with Deceuninck, Smart Architectural Systems and Saint-Gobain to work towards improved sustainability and energy efficient solutions by 2050.
With sustainability covering all stages of our manufacturing and installation process, we continually strive to improve our impact with the role our supply partners play.
Through our partnerships with Deceuninck, Smart Architectural Systems and Saint-Gobain, we can continue providing our customers with the best sustainable and environmentally friendly products.
As one of our key supply partners, our relationship with Deceuninck forms a critical part of our sustainability efforts. Aligning with their 2050 sustainability strategy, we can continue offering our customers their UK-leading sustainable window and door systems.
Outlined within their vision from 2021, Deceuninck aims to cut CO2 and greenhouse gas emissions from their operations by 2050. To achieve this, Deceuninck is investing in state-of-the-art technology and manufacturing of their products to provide sustainable solutions for homeowners and businesses.
Our energy efficient window and door range from Deceuninck is Part L and Future Homes ready.
Providing 100% recyclable aluminium systems, Smart Systems are another of Sternfenster’s sustainable supply partners. Using responsibly sourced aluminium, we can continue to recycle up to 24% of aluminium used within old products.
Aluminium is a material within our Smart System products that can be used repeatedly. Continuing their excellent high performance, a large majority of aluminium made is still used daily.
Being 100% recyclable, Smart ensures their aluminium recycling process uses minimal energy. Modernising this process, recycled aluminium makes up more than 24% of the aluminium created by Smart in 2021.
Saint-Gobain, our glass partner, has committed to achieving net zero carbon emissions by 2050. By 2030, they intend to halve their water usage, cut carbon emissions, and use recyclable materials and packages across their product range.
One of the critical factors to achieve within their sustainability strategy is to lower carbon manufacturing within their facilities. By increasing the use of post-consumer recycled glass, they can create an alternative energy source that improves their products’ sustainability and efficiency.
At Saint-Gobain, they recycle 100% of their glass in-house to improve the reduction of post-industrial waste their suppliers create. Similarly, they repaired their UK furnaces in 2022 to significantly increase capacity and lower the energy consumption of their products.
Find your nearest approved installer with Sternfenster today.
