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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.

uPVC Windows

View our wide range of Deceuninck uPVC, Aluminium and Residence Collection double glazed windows.

Industry leading uPVC Deceuninck windows provide energy efficiency, security and aesthetics.

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Aluminium Windows and Doors

Aluminium

Choose from our wide range of aluminium windows and doors.

Durable & energy efficient aluminium products from Smart, all manufactured in-house by Sternfenster.

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StyleLine Windows

StyleLine

Exquisite and unique graf-welded uPVC windows and doors exclusively from Sternfenster.

View our range of unique StyleLine windows and doors exclusive to Sternfenster.

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Sternfenster Window Systems

Leading ManufacturerTrade Supplier of uPVC & Aluminium Windows & Doors

Why Choose Sternfenster?

Manufacturing for 40 years

Manufacturing For 40 Years

Family run business, established since 1974 with over 40 years industry experience

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Competitive Prices

Competitive Trade Prices

We offer a wide range of uPVC and aluminium products at the most competitive trade prices

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Exclusive StyleLine Products

Exclusive Products

1st fabricator in the UK to offer a seamless weld on all uPVC windows and doors

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Approved Installer Network

Approved Installer Network

Our network of Approved Sternfenster installers provide an excellent service

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StyleLine

Exclusive Windows and Doors

We are the first fabricator in the UK to use the state-of-the-art Seamless Quad Welder, using a revolutionary welding process in manufacture.

Gain a competitive advantage today with our exclusive range of exquisite, seamlessly finished windows and doors.View our extensive range of beautiful StyleLine windows & doors to see the difference.

View StyleLine Page

Exclusive Windows and Doors

We are the first fabricator in the UK to use the state-of-the-art Seamless Quad Welder, using a revolutionary welding process in manufacture.

Gain a competitive advantage today with our exclusive range of exquisite, seamlessly finished windows and doors.View our extensive range of beautiful StyleLine windows & doors to see the difference.

View StyleLine Page

Industry Leading Manufacturer

  • Sternfenster Plus

    Sternfenster Plus

    Pricing, marketing support, order tracking and more

  • Express Lead Times

    Express Lead Times

    Fast turnaround available when you need it

  • Accredited Products

    Accredited Products

    Fully accredited, quality made windows and doors

  • 24 Hour remake service

    24 Hour Remake

    No fuss 24 hour remake policy

  • Nationwide Delivery

    Nationwide Delivery

    UK wide on time delivery

  • Painting Service

    Painting Service

    In house spray painting facility

  • uPVC & Aluminium

    uPVC & Aluminium

    Range of uPVC and aluminium windows & doors

  • Attractive Finishing

    Attractive Finishing

    All products are inspected and hand finished

  • Variety of options colours styles

    Variety Of Options

    Wide range of styles, colours & finishes

  • Competitive Prices

    Competitive Prices

    Competitive prices for attractive and secure windows & doors

  • Accredited Products

    Accredited Products

    Fully accredited, quality made windows and doors

  • Painting Service

    Painting Service

    In house spray painting facility

uPVC Products

  • All
  • /
  • uPVC Windows
  • /
  • uPVC Doors
  • /
  • The Residence Collection

Aluminium Products

Approved Installer Network

Our UK wide approved installer network comprises of local, reputable double glazing installers. Sternfenster approved installers have years of experience fitting uPVC and aluminium windows, doors and conservatories. Our trustworthy installers have been vetted and approved by us so you can expect exceptional products, services and aftercare. Find your nearest double glazing installer today to see their latest products and offers.

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Bespoke Spraying Service

Our in-house spraying facility allows us to supply uPVC and aluminium windows in over 250 RAL colours in satin finish. We offer a fast turnaround on colour frames and can match virtually any colour.

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New State of the Art Aluminium Factory

At Sternfenster, we have invested in a brand new, 35,000 sq. ft. aluminium factory to accommodate the high demand for high quality aluminium windows and doors.

We offer a comprehensive range of aluminium products, including Smart aluminium windows and doors, commercial shop fronts and curtain walling, as well as aluminium bi-folding doors in any configuration.

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Latest News

Latest Videos

Replacing Vertical Sliding Sash Window Sash


Video from Sternfenster Window Systems, showing how to replace the sash on a uPVC Vertical Sliding Sash Window. For quality uPVC sash windows, ...

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Removing Vertical Sliding Sash Window Sashes


Sternfenster video showing how to remove the sash from a vertical sliding sash window. For high quality uPVC sliding sash windows, visit: …

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Accreditations