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

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Outsource Your Fabrication to Sternfenster

Fabricator factory

Remove Fabrication Pains

We understand the fabrication process is proving too costly for many installers. Combined with rising costs across the industry and slumps in demand, there’s a risk that continuing with your own fabrication could put you out of business.

That’s where Sternfenster comes in. We believe we are stronger and more resilient together. By outsourcing your fabrication process to us, you are setting up your business to succeed in a market where many others not surviving.

  • Falling levels of enquiries
  • Increased risk of bad debt
  • Rapidly rising energy price
  • Supplier stock issues and rising prices/surcharges
  • Lack of supplier engagement and poor communication and assistance
  • Staff training, engagement, retention and recruitment issues
  • Inefficiencies due to increased short term absence and wellbeing issues
  • Increased costs of non-conformance
  • Issues surrounding Make Tax Digital
  • Increased Government red tape
Outsource to Sternfenster

Why Outsource To Sternfenster?

Sternfenster are a one-stop shop for all your fabrication needs.

We supply uPVC and aluminium windows and doors with or without glass. From powder-coating to bespoke foils, we do everything so you don’t have to.

As costs rise for materials and transport, the last thing you need is to worry about your fabrication process.

That’s where we can help – by taking over your fabrication and supplying the products you need – we help keep your business in a healthy state.

You can dedicate your efforts to selling and installing the products you know make the best profit margins.

Outsource to Sternfenster

The Benefits of Outsourcing to Sternfenster

Sternfenster has decades of experience in fabrication. That means we have an exceptional depth of knowledge that covers all aspects of the fabrication process.

We offer guaranteed quality you won’t find anywhere else on the market. Our fabricated double glazing products are the very definition of performance and style combined. You can trust us to get your fabrication needs bang on the mark to match your requirements.

The market is turbulent. That’s why our bespoke fabrication service is responsive and flexible – aligning with your needs as they change.

Outsource To Sternfenster

The Benefits of Outsourcing to Sternfenster

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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.
A Partnership That Works

G19 Fabricator of the year

We were honoured to be named G19’s Fabricator Of The Year in 2019’s G19 Awards.


Competitive Trade Prices

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

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Fast Lead Times - From 5 Days

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

Our Product Range

Easily Order uPVC & Aluminium Online

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

How We Do Business?

Innovative SFPlus Order Tracking & Quotes

Our exclusive SFPlus intranet is the perfect way to track your orders and get free quotes online.

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Exclusive Media Hub: Videos, Installation Guides & More

We have an abundance of exceptional installation guides and training videos in our media hub.

Marketing Offering

Marketing Materials: Branding, Brochures & More

It’s never been easier to market our products with access to a huge range of high quality marketing materials.

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Exceptional Warranties

Our product warranties cannot be beaten. We are proud to offer market leading aftercare services.

Our Product Range

Opportunities To Join Our 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.

How We Do Business?

Dedicated Field Account Manager

When you start selling Sterfenster, you will have a dedicated Field Account Manager assigned to you.


Over 45 Years Industry Experience

Here at Sternfenster, we have over 45 years of industry experience with no sign of slowing down.

*Express delivery service charges apply, must be ordered using EasyAdmin or Windowdesigner software on accounts terms and is subject to aviability.
Express delivery only aviable on Grey/White and Black profile.

**T&C apply. Five-day delivery is only available when ordered on our ordering system, EasyAdmin, and on account terms. Offer only available on White, Grey and Black profiles.