11
Jul '25
New Knurled Handles Added to Our Premium Hardware Range
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Are you a nice person and paying your suppliers to the agreed terms?
Do you have a digital presence or are you willing to invest in one?
Are you generating sales of £100,000 per year?
Could you benefit from the latest marketing package?
Could you benefit from more leads?
Are you looking for a partner to help you grow and expand your business?
Approved Installer Benefits
If you have what it takes, then you could benefit from becoming a Sternfenster Approved Installer!
Industry Leading Warranties
- 20 years on sealed units
- 20 years on aluminium
- 12 years on PVC profile
- 5 years on hardware
Dedicated
Marketing
- CGI Virtual Showroom
- CGI Video Content & Images
- Digital Brochures & Flyers
- Websites, SEO and PPC
- E-shot campaigns
- Social media management
- Branded Videos
Get Quick
Free Leads
- Generated leads for approved installers
- Quality quote engines
- Online conversion tools
- Dedicated area of operation
- Lead management dashboard
Leading
Guarantees
- Up to £2000* security guarantee
- £1000 towards a security breach
- £500 towards excess claims
- T&C’s Apply
Don't take our word for it...
Find out more from our approved installer network on why you should join us today!
Omega Windows
Wayne Windows
Over 50 Years at Sternfenster
WIN BIG TODAY!
Sternfenster Generated Leads
Did you know, we generate thousands of leads a year? Any leads generated on our website are automatically sent to the nearest Sternfenster Approved Installers in the area. Sign up to our network today and lean on over 50 years of industry experience and lead generation.
We’re here to boost your business with dedicated marketing support, conversion tools and all the collateral you need for your ongoing sales.
uPVC
We are a proud supplier of award winning Deceuninck uPVC windows and doors.
Market Leading 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
BECOME A STERFENSTER APPROVED INSTALLER
Install market leading uPVC Deceuninck windows with the full support of industry leaders Sternfenster.
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
JOIN OUR NETWORK & INSTALL SUPERIOR ALUMINIUM WINDOWS & DOORS
SIGN UP
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
EXPLORE GRIPCORE
Discover More
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.
