KC75
The KC75 is a high-performance aluminium casement window system designed to meet the demands of modern new-build developments and renovation projects. It delivers an outstanding combination of security, thermal efficiency and slim, elegant sightlines, making it an ideal choice for both residential and commercial applications.
Engineered for versatility, KC75 is available in top-hung and side-hung configurations. Its advanced central gasket system, combined with a thermally enhanced polyamide thermal break, ensures excellent insulation performance and significantly improved U-values.
The system also allows for internal or external dry glazing using clip-in beads, offering installation flexibility while maintaining a clean, refined finish.
Fully developed in line with current Building Regulations, including BFRC and Part L requirements, KC75 is also PAS 24 certified, providing assured security and high performance across a wide range of projects.
| Air permeability* | Class 3 |
| Water tightness* | E1200 |
| Wind load* | CE2400 |
| Thermal insulation Uw** | Double glaze – 1.3 W/m2K Triple glaze – 0.9 W/m2K |
* Air/Water/Wind tests according to standards BS6375-1
** Please note: U-Values are dependant on size and glass U-Values.
Maximun size (top hung): 1500x1500 mm
Maximun size (side hung): 900x1500 mm
Maximium weight: 50 kg
Maximun glazing: 60 mm
Polyamide: 32 mm
PAS-24 Security and Part L
Weather tested to BS6375-1
BFRC certified

Design
The KC75 features a refreshed, high-impact design that delivers a more contemporary and sophisticated aesthetic. It is available in two elegant finishes: a modern casement style with clean, contemporary lines, or a sleek flush sash option with a smooth, uniform appearance, offering greater versatility to suit a wide range of projects.
Features
With a glazing range from 44 to 60 mm the system can easily adapt to double, triple glazed units or even units incorporating interstitial blinds.
Standards compliance
Made in Britain to meet performance and security requirements of current Building Regulations. Fully compliant with Part L and BFRC standards, and certified to PAS 24 for enhanced security.
Possibilities
Available in both top-hung and side-hung applications, this system, featuring internal or external beading, also provides choices for open-out and French openings.
Register in our digital space Exlabesa 360 to have TechDocs at your disposal: a complete documentary library with all the technical information about Exlabesa Architecture’s aluminium systems.
Access Exlabesa 360 and enjoy exclusive content and functionalities:
- Catalogues, tests, reports, sections, DAP, BIM objects…
- Up to date information
- Notifications of updates and news


