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Homeowner

Our accredited network of installers offers the highest quality uPVC and aluminium products with excellent customer service.

Trade Customer

Access our latest technical information, product content, video archives, media centre, Sternfenster Plus and much more.

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saving

using our energy saving calculator

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FREE £2000

security guarantee

Standing out from the competition

Sternfenster Window Systems

Create the home you deserve with top quality Sternfenster products

Grow with
Sternfenster

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

Sternfenster uPVC Doors

Sternfenster uPVC 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.

interior french doors interior french doors

Enhance your home

Bespoke entrance doors

Sternfenster Aluminium Windows

Sternfenster uPVC 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.

Smart Aluminium Windows Smart Aluminium Windows

Thermally efficient entrance doors

Excellent Customisability

Sternfenster Aluminium Doors

Sternfenster Aluminium Windows

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.

Blue Aluminium Bi-Fold Doors Blue Aluminium Bi-Fold Doors

Smooth operating folding doors

Bespoke designs

Aluminium Bifold Doors

Aluminium Doors

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.

Windows

Windows

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Doors

Doors

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Aluminium

Aluminium

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StyleLine

StyleLine

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Awards and accreditations

G22_WINNER
IIP Award Brand Mark Gold

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 50 years

Family run business, established since 1974 with 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.

Start Selling Sternfenster

Find out why we are the best

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.

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Don't waste time, sell with Sternfenster today

Windows

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.

 

Doors

Strong, Secure, Energy Efficient Doors

Our low maintenance, colour fast, long lasting doors will give your home a beautiful look which will last for many years.

For products like our uPVC doors, there is no more painting or staining. All it takes is a simple wipe clean to keep your door looking as good as new.

Aluminium

Low Maintenance Aluminium

Our aluminium doors are cost effective, energy efficient and highly secure. All our designs are aesthetically pleasing and can add value to your home.

Naturally strong, low maintenance aluminium frames will keep your home secure but with no
compromise on energy efficiency thanks to polyamide thermal barriers.

uPVC Doors Prices
smart aluminium bifold doors

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.

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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

Exclusive trade offers

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

Business Support

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. With over 50 years experience in the trade, our partners can rely on our stability, insights and industry knowledge.

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

Fast Lead Times

Products From Just 5 Days

Why wait 5 weeks when you can have it in 5 days?

We utilise advanced manufacturing techniques and in-house spraying to deliver quality products when you need them. We can offer quicker lead times than our competitors, with speedy delivery options to your building site.

Any colour, any style – For colour frames, we offer fast turnarounds for uPVC and aluminium windows in virtually any colour you request. Get a quote today.

Sustainability Leaders

Recyclable Products

We are at the forefront of the mission to reduce carbon emissions within the double glazing industry. We make energy efficient windows and doors that offer next-generation thermal performance and help lower heating bills for the homeowner.

In addition, we ensure our uPVC, aluminium and steel profiles are sourced sustainably. This way, our products can be recycled easily into new windows and doors at the end of their product life. Learn more about sustainability at Sternfenster here.

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Trusted by our customers

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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

Over the past 50 years we have manufactured …

570 221

uPVC Windows

381 220

Aluminium Windows

120 310

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.

Case Study – Nottinghamshire Installation from Starglaze

Case Study – Nottinghamshire Installation from Starglaze

A Stunning Installation in Hythe, Kent

A Stunning Installation in Hythe, Kent

Case Study – Installation Project in East Sussex

Case Study – Installation Project in East Sussex

A Stunning Installation in Salisbury, Wiltshire

A Stunning Installation in Salisbury, Wiltshire

Awards and Accreditations

G22_WINNER
IIP Award Brand Mark Gold

We've Committed To Net Zero 2050

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.

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.

Start Selling Sternfenster
01

Great trade prices

Get access to the most competitive trade prices today.

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02

5 day lead times

We offer lead times as quick as five days. Choose Sternfenster for fast turnarounds.

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03

Outstanding service

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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04

Quality products

Enhance your sales with fully accredited, quality made windows and doors.

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05

Marketing support

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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Industry Leading uPVC Range

uPVC Range

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

High Performance Aluminium Range

Aluminium Range

Our aluminium range is sturdy, corrosion resistant and built to last. We build with environmentally friendly materials for high performance, aluminium casement windows.

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We've Committed To Net Zero 2050

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

Energy Saving Calculator

Use our energy saving calculator to find out how much you could save!

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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 or 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 To Sternfenster

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