Name: Cortizo Hidden Sash
Brand: FENX
SKU: FENX-1097

Cortizo Hidden Sash

Key Features

Concealed sash design – opening sashes look like fixed glass from outside
Ultra-slim 66mm sightlines for maximum glazing
U-values from 1.0–1.3 W/m²K, depending on glass
High-performance multi-point locking system
Fully customisable in terms of size, finish, and colour
PAS 24 compliant with correct specification
Suitable for modern architectural applications and luxury projects
Lead time: Typically 4–5 weeks

Key Features

Concealed sash design – opening sashes look like fixed glass from outside
Ultra-slim 66mm sightlines for maximum glazing
U-values from 1.0–1.3 W/m²K, depending on glass
High-performance multi-point locking system
Fully customisable in terms of size, finish, and colour
PAS 24 compliant with correct specification
Suitable for modern architectural applications and luxury projects
Lead time: Typically 4–5 weeks

Cortizo Hidden Sash

Cortizo Hidden Sash windows are the ultimate in minimalist aluminium window design. With the sash fully concealed behind the frame from the exterior, the result is a virtually frameless appearance that allows for maximum natural light and uninterrupted views.

Ideal for high-end residential or commercial projects, Hidden Sash systems provide ultra-slim sightlines and superior performance. Despite the minimalist look, security and thermal efficiency remain outstanding, with the option for PAS 24 certification.

Download Factsheet

Cortizo Hidden Sash

Cortizo Hidden Sash

You may also be interested in

Origin OW-80 Flush Casement

Cortizo Flush

Cortizo STD

All the brands under one roof

Let’s build something amazing together.