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Excellent thermal efficiency

Integrated thermal breaks deliver low u-values for the best energy efficiency.

Highly secure

Multi-point locking integrated as standard for the ultimate safety.

Made to suit your requirements

Engineered on a project-by-project basis, maintaining prompt turnaround times.

Choose from any RAL colour

A choice of over 150 RAL colours powder-coated, with dual finish options.

Aluminium Casement Windows for Trade Supply

Evaframe supplies premium Cortizo aluminium casement windows to installers and builders in South Wales and South West England. We design them for both residential and commercial projects, combining slim sightlines with excellent energy efficiency and security. Our in-house fabrication ensures fast lead times, consistent quality, and reliable delivery for every order.

High Performance and Flexible Design

The COR 70 Hidden Sash TB system creates a clean, modern appearance thanks to its slim sightlines and concealed sash. It has a 70 mm frame depth and advanced thermal break technology. As a result, it achieves U-values from 1.0 W/m²K. This system supports glazing up to 40 mm and provides acoustic insulation of up to 46 dB. It meets Class 4 air permeability, Class E1650 water tightness, and Class C5 wind resistance.

The Casement TB system is equally versatile. It offers 70 mm frames, glazing up to 44 mm, and the same high acoustic insulation performance. In addition, it has multiple opening options, including side-hung and top-hung. It is tested to Class 4 air permeability, Class E1200 water tightness, and CE2400 wind resistance.

Built for the Trade

We manufacture each window to your exact size and specification. This reduces time spent on site and ensures a precise fit. Both systems are available in over 150 RAL colours, with textured, anodised, and wood-effect finishes. Dual-colour options are also possible.

Security features include multi-point locking, optional concealed hinges, and hardware that meets PAS 24 standards. Therefore, these windows deliver both style and safety.

Contact us today for your trade quote on Cortizo aluminium casement windows and complete your projects with a high-performance, installer-friendly product.

Technical specifications

Cortizo Casement

  • Can attain U-values of 1.0 W/m2k
  • Double/triple glazed up to 44mm
  • Powder coated in RAL, mottled, rough & anodised finishes
  • Manufactured with quality polyamide thermal breaks
  • PAS24 certified for maximum security
  • Can be side hung or top hung

Why choose casement windows from Evaframe

Choosing Evaframe as your choice of aluminium casement window supplier means opting into a partnership that delivers high-quality products promptly, and with a high level of quality assurance. Those seeking to cater for the environmentally-conscious market can also rest easy knowing that casements engineered using 100% recyclable material can easily be supplied, giving you the edge over competitors.

Assuring installers and fitters have the easiest time possible when the time for installation arrives, all aluminium casement windows we provide are done so in accordance with BS 6375-1:2009. Achieving 600Pa for air permeability & water tightness, and 1600pa for wind resistance, through our supply you can keep focus on meeting customer expectations rather than dwell on technicalities.

You can also view our full aluminium product range here.

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Resources & Technical information

Browse our downloads for useful information about our range of aluminium windows and doors.

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Can’t find what you’re looking for or need some advice? Contact Evaframe today on 01633 848828

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