What you don’t see…

is what makes it exceptional.

COR 70 Concealed Sash Casement: the design you see, from a system you don’t notice.

The COR 70 Concealed Sash is a window designed for those who want to take a real step forward in the aesthetics and comfort of their home. Its design minimizes the visual presence of the frame, allowing the glass to take center stage and letting natural light flow in with a quality that completely transforms the feeling of any room. The space feels more spacious, visually cleaner, and enhanced by a contemporary elegance that fits seamlessly into both modern renovations and new-build projects.

This window directly addresses one of the most common issues in homes with outdated joinery: visual heaviness and a lack of brightness. As the frame almost completely disappears, light flows evenly and views integrate more seamlessly, creating a far more pleasant and balanced atmosphere.

Although its appearance is light and minimalist, the COR 70 Concealed Sash maintains an excellent level of comfort. Its structure is designed to provide effective protection against temperature variations and external noise, creating more stable and welcoming spaces throughout the year. It is a window that delivers well-being without compromising on design.

In everyday use, it stands out for its smoothness and precision when opening and closing, conveying a sense of quality that is noticeable from the very first moment. Its integration is simple and clean, allowing a home to be renovated without affecting the overall aesthetics and without complications during installation.

At DISPER, we manufacture and install this system with meticulous attention to detail, ensuring a flawless finish and a pleasant user experience from day one. The COR 70 Concealed Sash transforms any space with clarity, design, and well-being.

More glass surface, less visible frame

Unlike other systems where the frame maintains a strong visual presence, the COR 70 Concealed Sash completely hides the sash from the outside. This allows for a cleaner, more modern, and brighter finish—something that cannot be achieved with visible sash systems or more pronounced profiles.

Minimalist aesthetics that elevate any project

Its design is conceived to integrate seamlessly into contemporary styles with refined elegance. While other series offer a more standard or conventional aesthetic, the COR 70 delivers a carefully crafted architectural appearance—ideal for those seeking a high-end result without stepping up to more expensive systems.

Greater brightness and a stronger sense of interior spaciousness

Compared to alternatives such as standard casement systems or traditional sliding windows, the COR 70 Concealed Sash allows light to enter more evenly and makes the space feel more open. The glass occupies a larger percentage of the visible surface, enhancing brightness and the overall perception of space.

Better balance between design, efficiency, and versatility

Compared to other solutions from the brand that stand out for a more technical appearance or a more competitive price, the COR 70 Concealed Sash achieves a balance that is hard to match: minimalist aesthetics, excellent performance, versatile options for renovation or new-build projects, and a superior visual result without having to move up to premium large-format systems.

Technical details

It’s not a picture frame, it’s a window. That’s how we can describe the COR 70 Concealed Sash, which—like the 80 mm version—features a visible section of just 66 mm and allows the integration of the ARCH INVISIBLE handle. The hinges and drainage solution can also be concealed. In this way, any element that might disrupt the visual harmony of the overall design is eliminated.