Modern, energy-efficient, and secure

The Smart Alitherm Window range is very versatile and used in residential and commercial projects alike. We design both casement windows with the style and elegance of traditional timber products, and modern windows for contemporary homes or offices. A range of window types are available for different buildings, with an extensive choice of colours, handles and finishing touches that to help you complete your project with personal touches.


Aluminium windows offer strength and durability, with a high resistance to corrosion or rust. Your new windows will be virtually maintenance free, and are built to last. As aluminium is extremely recyclable, it makes for an environmentally friendly choice. We only supply and install the highest quality products, at affordable prices.

Thermally Efficient


As with all Smart Aluminium products, the Alitherm 300 window system includes a polyamide thermal break, creating a barrier between the cold air outside and the warmth internally.


Heat loss is significantly reduced and with the right glazing units, they meet the requirements of Building Regulations Doc L for Conservation of Fuel and Power.

Smart Alitherm 300 Windows windows and doors, with strength and durability, provide warmth and comfort year-round. Thermally efficient properties contribute to a reduction in the cost of heating bills.


The strength to weight ratio of aluminium means slimmer sightlines, with less frame and more glass. Rooms are filled with more natural light, and you can make the most of the views outside. The styling can be  enhanced by ovolo, chamfered or square edges.

Powder-Coated Windows


The Alitherm range can be coloured in any of over 200+ different RAL colours. You may choose differing colours on the inside and outside, to match with existing decor and other windows or doors. Our favourite colour schemes include modern grey powder-coated windows and bifold doors.

All our products are painted in a polyester powder coat finish, which is renowned for not fading or flaking.


In addition to a choice of standard and premium colours, including metallic, dual colour, we can also specify Smart’s Sensations textured, and Alchemy anodised effect finishes.


Fixtures & Fittings


No matter the age, or colour you choose for your new windows, we will have a handle that’s right for you.


From the standard handle seen on the left, to a premium metal finished monkey tail handle, each design comes in a range of colours and finishes of their own.


Some of our favourite projects have included modern and minimal looking marine grade stainless steel handles. We can go over all of the available options when we sit down to discuss your project.

Flush Aluminium Windows


Flush Look Aluminium Windows are a new product, intended to mimic traditional timber windows – much like the uPVC Flush Casement. They have an opening sash that sits level with the outer frame, giving you the look of a flush casement window, with an appealing sightline when closed. We love the look that is achieved with concealed mullions and transoms, and slim sash-to-sash sightlines of just 102mm.


High-security comes built in, and there is a wide range of traditional and modern furniture to complete the look. We can specify concealed night ventilation for this system too, maintaining the clean and minimal look of your new aluminium windows. The flush look window is a perfect match for our slim aluminium bifolding doors, and can be powder-coated with all the same finishes.

Alitherm Window Features

  • Double and Triple Glazed Units
  • Single and Dual Colour
  • Flush Look Window Option
  • High-Security multi-point locking
  • Polyamide Thermal Break
  • 70mm Frame Depth
  • Top Hung: Max Sash 1400x1300mm
  • Side Hung: Max Sash 700x1400mm
  • Doc L 2010: Yes
  • Compliance with Document Q
  • Window Energy Rating up to A