Alitherm Heritage Windows

Alitherm Heritage provides the ideal solution for heritage applications such as listed building renovations and large scale replica-refurbishment projects where planning constraints are to be considered. The window is designed to be built as a series of horizontal modules which can be stacked using horizontal couplers to form a multi-part window featuring a specially design drip bar between modules.


Alitherm Heritage profiles utilise Smart’s innovative polyamide thermal break technology which creates a barrier between the cold air outside and the warm air inside. This technology significantly reduces thermal transmittance and enhances the overall U Value of a product and is designed to meet the exacting requirements of Document L 2010.

litherm Heritage products are available in a choice of standard or non-standard colours, including metallic, dual colour, Smart’s Sensations textured, and Alchemy anodised effect finishes.


Aluminium windows look fantastic in modern homes, with their sleek, strong and contemporary profiles offering elegance and security.

Hugely versatile, aluminium windows can be designed to fit almost any shape or design due to their flexible material properties. This means your visoline aluminium windows can be as bespoke as you like, with a comprehensive range of designs, RAL colours and finishes at your fingertips.


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.

The energy efficiency of our aluminium windows will also notably increase the standard of central heating. This improved performance means heating will be needed less frequently, therefore reducing heating costs and carbon footprint, simultaneously.


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. We also offer bespoke colour options which include the Sensation range from Smart which features beautiful textured finishes. 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.

Velour White
Sienna Brown
Mars Red

Ocean Blue

Sky Blue
Provence Green
Amazon Green
Antique Green
Obsidian Black
Antique Grey
Platinum Grey
Silver Grey
Olive Green
Cocoa Brown
Frost White
Chestnut Brown
Desert Grey
Diamond Grey
Steel Blue



Strong Aluminium Profiles

We offer three main ranges of aluminium windows that stand out from the crowd thanks to their looks, strength, versatility and thermal efficiency. This not only allows an extended range of choice, it also makes it possible to accommodate for a wide scope of properties, both contemporary and traditional.

Although incredibly strong and robust, aluminium is also very malleable during the fabrication process, which enables our windows to benefit from a single piece design. This eliminates the need for corner joints, which can cause security and performance issues over time.

Alitherm Heritage 47 Profile

The Heritage 47 profile – a stunning slimline aluminium window – is the modern solution for traditional and period homes. It utilises a series of horizontal modules to create a multi-part window, loyally capturing the classical charm of an aesthetic that has been loved for generations. They make the perfect replacement for older steel windows.

Although traditional in design, the Heritage 47 profile upholds modern standards of quality and performance. Featuring an intelligently designed polyamide bridge, our slimline aluminium windows contain a thermal break to ensure exceptional standards of energy efficiency throughout your home.

To guarantee you get the perfect aesthetic for your property, we offer all aluminium windows featuring this slimline Heritage 47 profile in a wide range of colours, including standard, non-standard, metallic, dual colours, Smart’s Sensations textured and Alchemy anodised finishes.

Alitherm 300 Profile

Our Alitherm 300 Aluminium Window is guaranteed to add excellent aesthetics and performance to your home. You can benefit from their slimline profile, which means you get beautiful, unobstructed views from your home to the outside world.

The contemporary design of our Aluminium Windows makes them perfect for both modern homes and offices. Our Sternfenster Aluminium Windows meet Secured by Design standards as an optional upgrade, this is police approved and preferred locking system so you know your home will remain safe and secure against unwanted intruders.

Our Alitherm 300 Windows are available in a range of colours, so we can match the needs of your home and design! You can also opt to have dual colours for your Aluminium Windows so you can enhance both the internal and external aesthetics of your home perfectly.

These traditional open out casement style windows offer all the elegance and aesthetics of a timber product, but with the benefits of a modern Aluminium Window.