Aluminium windows offer slim sightlines, strength, and a contemporary appearance.
Designed to replicate a traditional crittal-style window, the Aluminium ‘Heritage’ is a replacement for slim original timber and steel windows – a modern, secure and energy-efficient alternative.
The slim sightlines offered by this range are much closer to original period windows thanks to the strength and rigidity of aluminium. And they perfectly match our Alitherm Heritage Door range.
Even our slimmest uPVC windows are double the width of this aluminium profile, which in many instances (especially on smaller windows) is unacceptable.
Contemporary colour options
The Heritage range of windows is available in eight powder-coated, matt colours, with the option of choosing a different colour for the interior to help you find the look that is right for your property. A further three anodised finishes are available for the ultimate durable and stylish finish.
Standard colours are as shown but these windows can also be powder coated in any RAL colour.

| Espag Offset Handles |
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![]() Six colours available Black • Grey • Polished Chrome • Polished Gold • Satin Chrome • White |
| Monkey Tail Handles |
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![]() Seven colours available Antique Bronze • Heritage Black • Heritage Pewter • Polished Chrome • Polished Gold • Smooth Satin • Powder Coat White |
| Tear Drop Handles |
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![]() Seven colours available Antique Bronze • Heritage Black • Heritage Pewter • Polished Chrome • Polished Gold • Smooth Satin • Powder Coat White |
We are experts at window and door replacements, along with the complete build of garden rooms, extensions, verandas, sky rooms and conservatories. Let us know what you’re after and we will arrange a site visit at a convenient time for you, discuss your ideals and then give you a full, free, no-obligation quote for everything involved.
Got a question? Just ask – our advice is free.
Aluminium windows offer slim sightlines, strength, and a contemporary appearance.
Yes. Aluminium allows larger panes with slimmer frames.
No. Powder-coated aluminium resists corrosion.
Most RAL colours are available.
Very little beyond routine cleaning.
Yes. Matching systems provide a consistent appearance.
Aluminium windows offer slimmer frames, greater strength, and a contemporary appearance while remaining highly durable.
No. Powder-coated finishes require only routine cleaning.
Some glazing systems can incorporate integral blinds.
Usually not, unless your property is listed or in a conservation area.
They usually cost more than uPVC but offer premium aesthetics and longevity.
Yes. KRB include product and installation guarantees for 10 years.
Yes. Matching finishes create a consistent look across your home.
A U-value measures how well a building part (such as a door or window) lets heat pass through it, with lower numbers meaning better insulation. It is measured in Watts per square metre Kelvin (W/m2K).
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