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Smart Aluminium Windows
Our aluminium windows are available in a wide range of appealing colours with a five year mechanical & surface guarantee.
Strong, environmentally friendly aluminium frames with a high performance polyamide thermal break designed to keep the warm in and the cold out.
All our casement windows are fitted with high security bi-directional locking points as standard.
We use fully automated CNC machinery centres to precision mitre our aluminium. This creates smooth, easy to clean corners.
Smart Aluminium Windows
Manufactured to British Standards 4873 and available with high security internally beaded sashes.
Partnering with leading brands such as Yale, we supply high performance hardware that is ergonomically designed to offer maximum hand clearance.
Our aluminium windows are available in a wide range of different colours with a five year mechanical & surface guarantee.
Strong, environmentally friendly aluminium frames with a high performance polyamide thermal break.
All our casement windows are fitted with high security bi-directional locking points as standard.
We use fully automated CNC machinery centres to precision mitre our aluminium. This creates smooth, easy to clean corners.
Highly Energy Efficient Profiles
Thermally efficient aluminium
The energy efficiency of our aluminium windows means that there is less heat transference through our units. This improved performance means heating will be needed less frequently, therefore reducing heating costs and carbon footprint.
Choose our thermally efficient Smart aluminium windows to enhance both the look and performance of your home today.
Over 50 Years of Experience
High quality aluminium
We are proud to have more than 50 years of manufacturing at Sternfenster and are fully committed to UK homeowners and offering sustainable products and services wherever possible. Working closely within the trade and retail industry, we offer nationwide delivery across our comprehensive portfolio. Find a Sternfenster approved installer near you today.
High Quality Profiles
Unrivalled quality
Our aluminium windows are manufactured using Smart aluminium profiles.
We also offer Smart EcoFutural tilt and turn windows which are suitable for all types of applications, both commercial and residential. The Smart profile offers unrivalled standards of thermal efficiency, security and durability.
energy efficient
Highly Energy Efficient Profiles
Thermally efficient aluminium
Our aluminium windows are built with a thermally broken aluminium frame and polyamide bridge, achieving outstanding energy performance. This design results in a higher standard of heat retention and guarantees a superior standard of energy management throughout.
Sell sustainable Smart aluminium windows with Sternfenster today. We can help grow your business with the latest, most efficient profiles available on the market.
Over 50 Years of Experience
High quality aluminium
Whether you are an experienced aluminium installer or are just thinking of entering this market, Sternfenster is the ideal partner for you. We are focused on delivering high-quality aluminium windows by Smarts at short lead times and competitive trade prices to help you win more business.
If you’re new to aluminium, our dedicated technical department is always on hand to help you run your installations as smoothly as possible.
High Quality Profiles
Unrivalled quality
Our aluminium windows are manufactured using Smart aluminium profiles.
We also offer Smart EcoFutural tilt and turn windows which are suitable for all types of applications, both commercial and residential. The Smart profile offers unrivalled standards of thermal efficiency, security and durability.
energy efficient
Transform Your Home's Look: Explore Our Window / Door Configurator -
Preview Our Extensive Range of Interior and Exterior Shades With The “Turn Around” Icon.
RAL Colours
Our standard RAL colours are readily stocked and available with quick turnarounds.
White
Agate Grey
Anthracite Grey
Black
Brown
Fir Green Matt
Ivory
Pebble Grey
Purple Red Matt
Signal Grey
Umbra Grey
Violet Blue
Dual Colours
Enjoy interior and exterior customisation, as well as shorter delivery times with our stunning dual colour options.
Premium Colours
Providing exceptional quality and individuality, our non stocked premium colour are available at an additional cost with extended lead times.
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Agate Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Anthracite Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Black
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Brown
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Fir Green Matt
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Ivory
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Pebble Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Purple Red Matt
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Signal Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Umbra Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Violet Blue
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Agate Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Anthracite Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Black - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Brown - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Fir Green Matt - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Ivory - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Pebble Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Purple Red Matt - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Signal Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Umbra Grey -White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Violet Blue - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
White - Ivory
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Any RAL
Comprehensive Choice of Colours
Our smart aluminium windows are available in a wide choice of colours and finishes. Our KL colour range offers short lead times whilst our RAL colour options offer a world of choice. Our aluminium windows can also be specified in a choice of wood finishes, as well as dual colour options where you have different colours on the inside and outside of the frame.
Clear
Arctic
Autumn
Casin
Chantilly
Charcoal Sticks
Contora
Cotswold
Digital
Everglade
Flemish
Florielle
Mayflower
Minister
Oak
Pelerine
Reeded
Stippolyte
Sycamore
Taffeta
Tribal
Warwick
Glass Selected:
Clear
Wide Range of Glazing Options
We offer a wide range of stained glass and bevelled glass designs to ensure that our windows offer a striking, impressive aesthetic. Our comprehensive range of styles allows anybody to find the perfect choice for their property with ease.
Antique Black
Black
Brilliant Bronze
Gold
Chrome
Grey
Satin Chrome
Solid Gold
White
Antique Black
Black
Brilliant Bronze
Gold
Chrome
Grey
Satin Chrome
Solid Gold
White
Extensive Choice of High Quality Hardware
Our handles are available in a choice of nine different colours, from standard white to Antique Black, perfectly complementing the style of any building.
Download Your Brochure
DOWNLOAD BROCHURESMake sure you download a brochure to check out our full range of aluminium windows and doors. They’re packed with plenty of additional information, including technical information, detailed colour swatches and photos.
Transform Your Home's Look: Explore Our Window / Door Configurator -
Preview Our Extensive Range of Interior and Exterior Shades With The “Turn Around” Icon.
RAL Colours
Our standard RAL colours are readily stocked and available with quick turnarounds.
White
Agate Grey
Anthracite Grey
Black
Brown
Fir Green Matt
Ivory
Pebble Grey
Purple Red Matt
Signal Grey
Umbra Grey
Violet Blue
Dual Colours
Enjoy interior and exterior customisation, as well as shorter delivery times with our stunning dual colour options.
Premium Colours
Providing exceptional quality and individuality, our non stocked premium colour are available at an additional cost with extended lead times.
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Agate Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Anthracite Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Black
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Brown
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Fir Green Matt
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Ivory
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Pebble Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Purple Red Matt
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Signal Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Umbra Grey
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Violet Blue
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Agate Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Anthracite Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Black - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Brown - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Fir Green Matt - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Ivory - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Pebble Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Purple Red Matt - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Signal Grey - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Umbra Grey -White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Violet Blue - White
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
White - Ivory
TURN AROUND
Outside View
*Colour configurations are for illustration purposes only. For detailed colours, contact us today.
Frame Colour Selected:
Any RAL
Comprehensive Choice of Colours
Our smart aluminium windows are available in a wide choice of colours and finishes. Our KL colour range offers short lead times whilst our RAL colour options offer a world of choice. Our aluminium windows can also be specified in a choice of wood finishes, as well as dual colour options where you have different colours on the inside and outside of the frame.
Clear
Arctic
Autumn
Casin
Chantilly
Charcoal Sticks
Contora
Cotswold
Digital
Everglade
Flemish
Florielle
Mayflower
Minister
Oak
Pelerine
Reeded
Stippolyte
Sycamore
Taffeta
Tribal
Warwick
Glass Selected:
Clear
Wide Range of Glazing Options
We offer a wide range of stained glass and bevelled glass designs to ensure that our windows offer a striking, impressive aesthetic. Our comprehensive range of styles allows anybody to find the perfect choice for their property with ease.
Antique Black
Black
Brilliant Bronze
Gold
Chrome
Grey
Satin Chrome
Solid Gold
White
Antique Black
Black
Brilliant Bronze
Gold
Chrome
Grey
Satin Chrome
Solid Gold
White
Extensive Choice of High Quality Hardware
Our handles are available in a choice of nine different colours, from standard white to Antique Black, perfectly complementing the style of any building.
Download Your Brochure
DOWNLOAD BROCHURESMake sure you download a brochure to check out our full range of aluminium windows and doors. They’re packed with plenty of additional information, including technical information, detailed colour swatches and photos.
Click through our showroom to explore our products in greater detail
Explore Our Virtual Showroom
Click through our showroom to explore our products in greater detail
Explore Our Virtual Showroom
Alitherm Heritage 47 Window
Our slimline aluminium windows are perfect for old or listed buildings where planning constraints need to be considered. They can blend seamlessly into any building type due to their comprehensive range of colours, providing the perfect match for traditional homes.
Alitherm 400 Profile
Our Alitherm 400 is manufactured to British Standard Kitemark system KM 81580 KM 8143, so you know these aluminium windows come with excellent levels of performance, as well as aesthetics.
This system contains an extended polyamide thermal break, which improves the overall U-Value of the aluminium window. Our aluminium windows also contain bi-directional espagnolette multi-point locking to ensure high-security.
Alitherm Heritage 47 Window
Our slimline aluminium windows are manufactured with the Alitherm Heritage 47 profile system from Smart, built to the exact requirements of Document L.
These slimline aluminium windows are designed for heritage and renovation projects, acting as great alternatives to old steel windows. They feature a high performance polyamide bridge that allows out of date buildings to benefit from modern thermal efficiency.
Alitherm 400 Profile
The Alitherm 400 offers a 70mm square outer frame with unobtrusive glass sightlines so there are stunning, widespan views of the outside world. The overall frame U-value reaches 1.5 W/m2K – WER A.
Frequently Asked Questions
What are the maximum dimensions of your aluminium windows?
Here are the maximum dimensions of our aluminium windows:
- Maximum side hung sash width 700mm, maximum side hung height 1400mm
- Maximum top hung sash width 1400mm, maximum top hung height 1300mm
What advantages do aluminium windows offer?
Aluminium windows typically have a longer lifespan, meaning you could save money on replacements. To save on energy costs, our Smart aluminium windows have thermal break technology to create a barrier between the cold outside climate and the warm air inside.
Are aluminium windows sustainable?
Aluminium is known as a green metal. This is because it can be infinitely recycled into the same object. Find out more about sustainability at Sternfenster here.
Who is Sternfenster?
Established in 1974, Sternfenster became one of the UK’s largest trade fabricators of uPVC and aluminium windows and doors. Currently run by Mike and Simon Parczuk, the original founders’ sons, with over 250 employees and hundreds of years combined experience we continue to deliver high-quality products nationally but with the values of a family-run business.
We are proud to have over 50 years of manufacturing at Sternfenster and are fully committed to UK homeowners and offering sustainable products and services wherever possible. We offer nationwide delivery across our comprehensive portfolio and have an approved installer network.
How fast are your lead times?
We offer exceptionally fast lead times as low as five days, without compromising on the quality of our products or customer service.
Frequently Asked Questions
What are the maximum dimensions of your aluminium windows?
Here are the maximum dimensions of our aluminium windows:
- Maximum side hung sash width 700mm, maximum side hung height 1400mm
- Maximum top hung sash width 1400mm, maximum top hung height 1300mm
Who is Sternfenster?
Established in 1974, Sternfenster became one of the UK’s largest trade fabricators of uPVC and aluminium windows and doors. Currently run by Mike and Simon Parczuk, the original founders’ sons, we continue to deliver high-quality products nationally but with the values of a family-run business.
What advantages do Sternfenster offer?
As a member of our approved installer network, you can gain the advantage of exclusive product guarantees, marketing materials and excellent security guarantees.
How do I become a Sternfenster approved installer?
Are you looking for a supplier to help you grow and expand your business? Find out what it takes to join our exclusive club here.
How fast are your lead times?
We offer exceptionally fast lead times as low as five days, without compromising on the quality of our products or customer service.
Find Your Approved Installer
Our network of approved installers guarantees you the best service and the highest quality products.
- Postcode
- Name
- Contact Details
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 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.
