The KC51 windows suite is a comprehensive collection of aluminium window systems compatible with new-build and renovation projects. KC51 windows are available with either 51mm or 75mm sub frame. They feature a mechanical corner cleat for easy and fast fabrication and can be used for composite, ribbon, and punched hole applications.

Aluminium windows manufactured using the KC51 system provide outstanding levels of weather protection. A range of opening configurations can be incorporated into the window’s design including wide opening systems for easy cleaning access. An integral drainage system is used to remove any water build up onto either a cill section or advanced face drain cap. Trickle vents can be incorporated into the system’s design in line with current building regulations and the window can be glazed from either the interior or exterior.

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  • Technical information
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  • FAQ
  • Features

    • Ultra-slim sight lines
    • Integral drainage system
    • Top or side hung configurations
    • Polyamide thermal breaks
    • Mechanical corner joints for easy fabrication
    • Available as wide opening ‘escape’ windows
    • Egress options as standard
    • Cills, add ons, curtain walling inser and coupler sections available
    • Reverse adaptators for interior/exterior glazing
    • Compatible with exlabesa KLW curtain wall system

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    Sample cut out

    Technical information

    • 32,8 mm double glazing
    • 75mm polyamide sub-frame section
    • Maximum vent size (top hung): 1500mm x 1500mm
    • U-values as low as 1.4W/m²k
    • Weather tested to BS 6375-12009, BS6375-2 & BS6375-3
    • PAS-24 tested

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    Sample cut out



    Are aluminium windows good?

    Aluminium windows are strong durable, highly corrosion resistant and fireproof. They do not need painting to keep them weatherproof and they will never rot. Aluminium windows also have great thermal qualities and can hold large panes of glass.

    How long will aluminium windows last?

    Aluminium windows last for decades and during that time provide trouble-free use and operation. Aluminium is a naturally strong and durable material making it perfect for windows. They will last nearly twice as long as uPVC windows.

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    KC51 Window sample

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