Cortizo COR 70 Hidden Sash TB – Hidden Sash Tilt and Turn Windows

Key specifications
- Sleek Aesthetic: Fully hidden sash and handle ensure a clean, flush appearance.
- Slim Sightlines: Boasts a slim sightline of only 66 mm, maximizing the glass area and enhancing natural light.
- Energy Efficiency: Outstanding thermal performance with overall U-values as low as 1.0 W/m²K.
- Acoustic Insulation: Offers soundproofing up to 46 dB for a quiet indoor environment.
- Robust Build: Can support sash dimensions up to 1300mm x 2400mm and weights of up to 160kg.
- Integrated Features: Hidden hinges, drainage system, and ARCH INVISIBLE handle for seamless functionality.
- Security Certified: Meets PAS24 accreditation and stringent security standards.
- Ideal for Any Project: Suitable for residential and commercial applications, including new developments and window replacements.

Windows with integrated blinds
Enhance your windows with built-in blinds that offer privacy and light control. These blinds feature flexible operation options, allowing you to choose between manual, solar, battery-powered, or mains-powered mechanisms. Designed for a clean and seamless appearance, the blinds are integrated within the window, eliminating tangling or noise for a sleek and hassle-free experience.


I was impressed by the wide range of customization options for our new doors. The team was knowledgeable and guided me through the process effortlessly. The results exceeded my expectations!
Michael R.

The energy efficiency of the triple-glazed windows we purchased has made such a difference in our home. We’ve noticed lower energy bills and a much quieter living space. Thank you, 4 Moon Windows!
Sarah L.

4 Moon Windows transformed my home with their beautifully crafted windows and doors. The quality and attention to detail are exceptional. Their team was professional, and the installation was seamless. Highly recommend!