Standing out from the competition
Sternfenster Window Systems
Want to use Sternfenster’s industry leading products on your next project? We can put you in touch with local installers in your area for our market leading uPVC windows and double glazing products. Get a free online quote today.
Multi award-winning manufacturer of uPVC & aluminium windows & doors.
Stylish, cost effective and energy efficient
Environmentally friendly windows
Give your property an instant upgrade with our stylish uPVC entrance doors. They look amazing, are easy to maintain and can add value to your property.
We are committed to be carbon neutral by 2050, producing strong, recyclable uPVC windows we can contribute to the circular economy and cut down on carbon emissions. Get a free quote.
Enhance your home
Bespoke entrance doors
Our modern aluminium windows are available in a wide range of styles, colours and hardware to suit your home design.
We manufacture an extensive range of uPVC entrance door styles and hardware to expand your sales. These steel reinforced doors have been built to last.
Thermally efficient entrance doors
Excellent Customisability
Get high performance aluminium doors today that retain heat and offer industry leading levels of security for your protection and peace of mind.
Choose us for building regulation compliant aluminium windows in a wide variety of styles and colours to offer your customers plenty of choice.
Smooth operating folding doors
Bespoke designs
Open out your living space and bring the outside in, with our aluminium bifold doors. Create new space and let natural light flood in.
Offer your customers exactly what they are looking for with one of the UK’s most extensive ranges of aluminium residential doors from Sternfenster.
Discover our industry leading products. We have a wide range of high quality windows and doors to enhance your home improvement project.
Explore our market leading products in more detail by looking through our interactive brochures and watching our videos.
We can put you in touch with a local trusted installer near you. Use our service to locate a qualified fitter in your local area.
Once your high quality new products are installed, enjoy the peace of mind, looks and security that our products will give you for years to come.
Family run business, established since 1974 with 50 years industry experience.
Find out moreWe were the 1st fabricator in the UK to offer a seamless graf-weld on uPVC windows and doors.
Find out moreJoin our Approved Installer Network for exclusive product guarantees, marketing materials, business mini-site and monthly lead generation.
Find Out MoreWe supply industry leading windows and doors from just 5 days.
Start Selling SternfensterWe are one of the most transparent manufacturers in the industry. We’ve got nothing to hide. Learn all there is to know about Sternfenster and why it makes sense to choose us as your supplier of choice to help you grow.
We know our industry leading products will meet all your expectations and more. Discover how you can transform your home with Sternfenster today.
Join us and take advantage of exclusive trade offers from Sternfenster today.
uPVC Windows
Aluminium Windows
Bi-Fold Doors
View some of our most recent projects and see what customers have to say about us. We have supplied everything from modern new builds to traditional properties and renovations.
We are one of the largest, and most established names in the double glazing industry.
As industry leaders, we are ensuring our products are manufactured sustainably and that they cut down on carbon emissions. All this forms part of our commitment to achieve Net Zero by 2050.
Greener
We are cutting down on carbon emissions in line with the government's Net Zero Strategy.
Thermal Efficiency
With lower carbon emissions through more energy efficient windows, homeowners reduce on heating costs.
Recyclable
100% recyclable and widely recycled. Our products contribute to a circular economy.
Help your customer to enhance their home with fully accredited, quality made windows and doors. All of the options we offer have been tried and tested to ensure that they offer the highest standards of thermal efficiency, security and durability.
Get access to the most competitive trade prices today.
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We offer lead times as quick as five days. Choose Sternfenster for fast turnarounds.
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We offer dedicated marketing support to our trade customers, providing them with all the collateral they need, from brochures to videos and software.
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Enhance your sales with fully accredited, quality made windows and doors.
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We offer dedicated marketing support to our trade customers, providing them with all the collateral they need, from brochures to videos and software.
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We are all in on our mission to reduce carbon emissions within the double glazing industry, including a personal commitment to achieve Net Zero by 2050.
Greener
Lower carbon manufacture using recycled materials
Warmer
Making homes more energy efficient
Recyclable
100% recyclable and widely recycled
Find your nearest approved installer with Sternfenster today.
