Greener, warmer and recyclable home improvement products and solutions for your home

Supporting The Journey to Net Zero By 2050

As industry leaders, we understand our responsibility to provide sustainable and efficient products for homeowners. Read below to find out how we’re making a difference to carbon emissions and are committed to hitting Net Zero by 2050.

#SternFensterAt50

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Lower carbon manufacturing, greater energy efficiency

Supporting The Journey to Net Zero By 2050

As industry leaders, we manufacture our products sustainably to cut down on carbon emissions. We are committed to achieving Net Zero by 2050.

#SternFensterAt50

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Creating sustainable futures, together

We’ve already recorded a 7% reduction in CO2 year on year by manufacturing energy-efficient windows and doors, by sourcing sustainable materials and by continuing to invest in renewable energy manufacturing.

Energy
consumption
CO2 kg in 2022 CO2 kg in 2023 Year on year
change
Electricity (kwh) 2,303,833 489,173 354,292 -28%
Gas (kwh) 934,317 171,130 146,390 -14%
Diesel (Litres) 180,100 452,469 408,042 -10%
TOTAL 1,113,902 910,447 -18%
Emissions Saved 101,055 115,893 15%

Creating sustainable futures, together

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
CO2 kg in 2022 CO2 kg in 2023 Year on year
change
Electricity (kwh) 2,303,833 489,173 354,292 -28%
Gas (kwh) 934,317 171,130 146,390 -14%
Diesel (Litres) 180,100 452,469 408,042 -10%
TOTAL 1,113,902 910,447 -18%
Emissions Saved 101,055 115,893 15%

There's no Planet B. Let's protect our Earth. Future generations are relying on us to change now.

About Us
Our Vision
Our Solution

About Us

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 over 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.

There's no Planet B. Let's protect our Earth. Future generations are relying on us to change now.

About Us
Our Vision
Our Solution

About Us

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 over 50 years of manufacturing experience 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.

uPVC Windows & Doors

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.

Deceuninck's Sustainability Commitments

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.

Recycling & Circular Recycling Creation

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.

FIND OUT MORE

Aluminium

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.

Recyclable Aluminium Materials

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.

Aluminium Window Carbon Footprint

Lower Carbon Future

Reducing Chemical Usage

FIND OUT ABOUT OUR RANGE OF ENERGY EFFICIENT ALUMINIUM WINDOWS AND DOORS

FIND OUT MORE

Glass

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.

Lower Carbon Manufacture

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.

Lower Carbon Glass

Advanced Thermal Performance

FIND OUT ABOUT OUR RANGE OF ENERGY EFFICIENT INSULATED GLAZED-UNITS

FIND OUT MORE

uPVC Windows & Doors

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.

Deceuninck's Sustainability Commitments

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.

Recycling & Circular Recycling Creation

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.

FIND OUT MORE

Recyclable Aluminium

Using responsibly sourced aluminium from our long term partners Smart, we can recycle up to 24% of aluminium used within old products.

Recyclable Aluminium Materials

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.

Aluminium Window Carbon Footprint

Lower Carbon Future

Reducing Chemical Usage

FIND OUT ABOUT OUR RANGE OF ENERGY EFFICIENT ALUMINIUM WINDOWS AND DOORS

FIND OUT MORE

Sustainable Glass

Saint-Gobain, our glass partner, is 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.

Lower Carbon Manufacture

A crucial part of Saint Gobain’s 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.

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.

Lower Carbon Glass

Advanced Thermal Performance

FIND OUT ABOUT OUR RANGE OF ENERGY EFFICIENT INSULATED GLAZED-UNITS

FIND OUT MORE
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