Concealed Sash Aluminum Windows: Decalu 88 Hidden
The perfect synergy of minimalist aluminum profiles, modern design, and thermal performance
If you are looking for ultimate brightness and architectural design, Decalu 88 Hidden concealed sash aluminum windows are the definitive choice. This innovative system completely hides the window sash behind the outer frame. This guarantees a completely uniform external flush look where fixed glazing and opening vents look identical, creating a seamless all-glass aesthetic.
This minimalist hidden frame feature makes these hidden sash windows highly preferred by architects for contemporary residential and commercial buildings. Compare this premium solution with our uPVC window prices to get a complete overview for your project.
Useful information
- Uw = 0.74 W/m²K
- 3 chambers
- 2 gaskets
- Frame depth 88 mm
- Maximum glass thickness 63 mm
- Concealed sash (hidden frame)
Decalu Secrets: The Ultimate Flush All-Glass Style
Technical Features of Concealed Sash Aluminum Windows
The core strength of Decalu 88 Hidden aluminum windows lies in integrating thick, high-performance glazing without altering the slim sash profile. This system stands out due to its unique internal glass clip technology, setting it apart from standard competitor products. Additionally, the slim movable mullion for the hidden sash configuration features a minimum visible width of just 111 mm to maximize natural light.
The engineering range provides outstanding design flexibility for modern architectural projects, blending opening sashes seamlessly into fixed structural glazing.
- Ultra-slim movable mullion (111 mm)
- Concealed frame profile for maximum glass area
Top-Class Energy Efficiency and Thermal Insulation
When it comes to thermal efficiency, the Decalu 88 Hidden aluminum thermal break system is ideal for low-energy and passive homes. Every structural detail of the profile has been engineered to maximize the insulation properties of the aluminum frame.
With a construction depth of 88 mm, it delivers elite thermal performance (Uw values down to 0.74), completely removing the drafts and thermal bridging found in old-generation aluminum frames.
- 88 mm frame depth for advanced thermal break
- Excellent insulation with Uw up to 0.74 W/m²K
The Hidden Frame Window Revolution
The concealed sash is the most important milestone in modern minimalist aluminum window design.
On traditional casement windows, the visible sash profile breaks the sleek lines of the facade. The Decalu system solves this by creating a completely flat, elegant all-glass surface where the sash disappears entirely behind the frame. This results in a clean architectural look that perfectly matches luxury contemporary designs.
