Casement windows

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.