STANDING OUT FROM THE COMPETITION

Create the home you deserve with top quality Sternfenster products

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.

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STERNFENSTER WINDOW SYSTEMS

Grow with Sternfenster

Multi award-winning manufacturer of uPVC & aluminium windows & doors.

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Awards and Accreditations

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g23 award logo
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What to do next?

Find your
product

Discover our industry leading products. We have a wide range of high quality windows and doors to enhance your home improvement project.

View our
brochures

Explore our market leading products in more detail by looking through our interactive brochures and watching our videos.

Find your local installer

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.

Enjoy your new product

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.

Why choose Sternfenster?

Manufacturing for over 50 years

Family run business, established since 1974 with over 50 years industry experience.

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Industry leading products

We were the 1st fabricator in the UK to offer a seamless graf-weld on uPVC windows and doors.

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Approved Installer Network

Join our Approved Installer Network for exclusive product guarantees, marketing materials, business mini-site and monthly lead generation.

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Fast delivery from as little as 5 days

We supply industry leading windows and doors from just 5 days.

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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!

SPIN TO WIN

Find out why our customers rate us

We 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.

Don’t waste time, sell with Sternfenster today

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Exclusive trade offers

Join us and take advantage of exclusive trade offers from Sternfenster today.

Shaping The Future Of Windows

We manufacture market leading windows that provide your home with exceptional security, energy efficiency and stunning aesthetics.

Our popular casement windows are hinged to one side and feature a single lever latch design for simple and smooth operation. These windows can be installed throughout the home thanks to their hugely practical design.

Sternfenster Business Support & Guidance

Grow with one of the UK’s leading fabricators. Our award-winning services will help you to build your reputation as a business, providing you with all the materials you need to drive and increase your sales.

We are fully aligned with the latest trends and developments in uPVC and aluminium double glazed windows and doors. Leverage our expertise and realise your business potential. Start selling from us today or become a part of our national network.

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Industry Leading Windows and Doors

We know our industry leading products will meet all your expectations and more. Discover how you can transform your home with Sternfenster today.

The team in the factory made high quality windows. Fitters, Darren and Scott, super efficient, friendly and highly skilled. They finished off the job to perfection. We can feel the difference. All of this and very good value for money.

Max & Sue

We have been dealing with Sternfenster for the last 15 years, and they have taken my company from strength to strength. Their staff are all professional and personal, they always go the extra mile to see things go smoothly, even after working hours.

Crown Windows

Excellent service and competitive pricing. A very professional and trustworthy local company. I would definitely use again and highly recommend Sternfenster. Five Stars well deserved.

Simon Burt

We’ve been a customer of Sternfenster for 18 years. With their marketing support and constant drive to produce innovative products, as a company we wouldn’t be where we are today without them.

Supreme Windows Ltd

Join the ranks of satisfied customers who have experienced the Sternfenster difference firsthand.

Trusted by our customers

Discover why Sternfenster is trusted by our customers. Take a look at our case studies and authentic customer testimonials below. Find out how how we’ve consistently delivered exceptional products and service satisfaction.

The team in the factory made high quality windows. Fitters, Darren and Scott, super efficient, friendly and highly skilled. They finished off the job to perfection. We can feel the difference. All of this and very good value for money.

Max & Sue

We have been dealing with Sternfenster for the last 15 years, and they have taken my company from strength to strength. Their staff are all professional and personal, they always go the extra mile to see things go smoothly, even after working hours.

Crown Windows

Excellent service and competitive pricing. A very professional and trustworthy local company. I would definitely use again and highly recommend Sternfenster. Five Stars well deserved.

Simon Burt

We’ve been a customer of Sternfenster for 18 years. With their marketing support and constant drive to produce innovative products, as a company we wouldn’t be where we are today without them.

Supreme Windows Ltd

Join the ranks of satisfied customers who have experienced the Sternfenster difference firsthand.

For more than 50 years we have manufactured …

570221

uPVC Windows

381220

Aluminium Windows

120310

Bi-Fold Doors

Our Recent Projects

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.

Awards and Accreditations

We are a multi-award winning fabricator, renowned throughout the industry for the quality of service we provide.

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lincoln age logo
ggf logo
smart logo
bsi logo
lincoln logo
fensa logo
g23 award logo
edgetech logo
doorco logo
saint gobain logo
deceuninck logo
ultion logo

We are the industry leaders

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.

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01

Great Trade Prices

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02

5 Day Lead Times

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03

Outstanding Service

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04

Quality Products

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05

Marketing Support

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uPVC Range

Look no further than Sternfenster for uPVC. At our cutting edge facility, we use the latest manufacturing techniques to ensure our products are ahead of our competitors. Our uPVC windows are high performance and fully recyclable.

Industry Leading uPVC Range

Look no further than Sternfenster for uPVC. At our cutting edge facility, we use the latest manufacturing techniques to ensure our products are ahead of our competitors. Our uPVC windows are high performance and fully recyclable.

Energy Savings Calculator

Use our energy savings calculator to find out how much upgrading your windows can save you in the long run.

Find Your Approved Installer

Find your nearest approved installer with Sternfenster today.

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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.

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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.

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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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