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Start Selling Sternfenster

Save time, reduce your costs and make more money when you start selling Sternfenster.


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The Top Eight Reasons To Choose Sternfenster

The reasons to buy from Sternfenster are endless, but here are the top eight voted for by our trade customers:

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Competitive Trade Prices

Sternfenster are committed to offering the highest quality at the most competitive trade prices.

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Exceptional Warranties

We offer industry leading warranties and we are proud to offer market leading aftercare services.

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Lead Times

We offer lead times as fast as five days without compromising on quality.

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Easily Order uPVC & Aluminium Online

We have a fantastic online system which makes ordering your uPVC and aluminium products easier than ever.

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Leading uPVC, Aluminium & Glass Fabricators!

We are one of the UK’s largest trade fabricators of high quality uPVC, Aluminium Windows and Doors. With our own in-house glass line and toughening plant, we truly are a one stop shop.

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Innovative SFPlus Order Tracking & Quotes

Your dedicated resource centre to track deliveries, access dispatch notes, view quotes and orders, review past contracts and access marketing and technical information for our products.

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Multi Award

We’ve been finalists for the past five years at the prestigious G Awards, proudly taking the top spot for fabricator of the year and training and development initiative of the year for 2022 & 2023.

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Marketing Materials: Branding, Brochures & More!

Access our huge range of marketing materials and industry leading CGI showroom to sell our fantastic products!

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Over 50 Years at Sternfenster

Join us as we celebrate our 50th year in business with a chance to win prizes!

Win Big Today!

Approved Installer Network

Learn about the benefits of being a part of our Approved Installer Network, with the opportunity to be a part of it.

As a family run business, established in 1974, we have always invested an exceptional amount of effort into our extraordinary network. Part of our commitment to our installers is reflected in our ability to deliver outstanding quality with the fastest lead times possible.

Don’t take our word for it, hear from our installers themselves!

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Start Selling Sternfenster

As one of the UK’s largest trade fabricators of uPVC and Aluminium, we are proud to offer installers market leading products that have been trusted by homeowners and tradespeople alike for over 50 years! We have always invested an exceptional amount of effort into our extraordinary network.

Our industry leading products, fabricated in our state of the art factory in Lincoln, are just one of the many reasons to start selling Sternfenster to your customers.

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It’s About You And Your Business

Part of our commitment to our installers is reflected in our ability to deliver outstanding quality with the fastest lead times possible — because we know this enables them to grow their reputation as well as their profits.

But selling Sternfenster is far more than just purchasing and installing our products. We have an extraordinary range of benefits on offer to ensure you are delivering the best possible services to your customers and clients. From exclusive marketing and training materials to exceptional aftercare services and warranties, it is no wonder installers throughout the UK continue to invest their trust in Sternfenster.

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Our Key Supply Partners

As one of the largest organisations in the country, we manage the supply chain flow both upstream and downstream to help you manage your own business more efficiently. Discover more about our key supply partners below and start selling with us today.

Deceuninck uPVC

We are a proud supplier of award winning Deceuninck uPVC windows and doors.

Versatile Profiles

With Deceuninck uPVC windows and doors, we can manufacture products suited for a vast range of residential and commercial projects. As a Sternfenster Approved Installer, you’ll be able to fit high-quality Deceuninck windows anywhere in the UK.

High Performance Solutions

Award Winning Colour Range


Our energy efficient uPVC window and door range from Deceuninck is Part L and Future Homes ready.


Smart Aluminium

Our long standing partnership with SMART Systems enables us to offer a wide range of high quality aluminum windows and doors.

Modern Profiles

Aluminium is not only inherently strong and secure, it can easily be structured into styles to suit any UK project. We can supply contemporary modern profiles for homeowners along with shop fronts and large patio doors for the commercial sector.

Fully Customisable



DoorCo Composite Doors

We are constantly innovating and pushing industry boundaries with our partners at DoorCo.

Enhance Your Sales

Our key supply partners DoorCo are always pushing the boundaries with innovative new door technology. With our reliable supplier, we’re able to deliver the quality our customers have come to expect of us over our 50 years in business.

Advanced Thermal Performance



Training Academy

Gain access to our exclusive Sternfenster Training Academy when you Start Selling Sternfenster!

Sternfenster are proud to present the Sternfenster Training Academy – a fantastic opportunity to brush up on your Sternfenster product knowledge and gain valuable on the job skills. Deliver exceptional installations to your customers with a hands-on Sternfenster training day!

Learn all about installing our products in this unique hands-on course!


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Start Selling Sternfenster Today

Get in touch today with enquires for any of our market leading products. Sell the best with Sternfenster.


Become An Approved Installer

Grow your business with an award winning manufacturer. We’ll support you with materials and expert guidance every step of the way.


Outsource Fabrication To Sternfenster

Looking to outsource for any of your projects? Get started today. We will provide you with expert guidance for your trade success.


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