Double Sash Windows

Double Sash Tilt, Tilt & Turn, or Turn Windows
Double Sash  Tilt, Tilt & Turn, or Turn Windows represent an innovative window design that features two independently operable sashes within a single window frame.
Unlike traditional double-hung windows where sashes only slide vertically, these windows offer multiple opening functions through sophisticated hardware mechanisms.

These windows are constructed with insulated glass units (IGUs) in each sash, consisting of two or more glass panes separated by gas-filled spaces.
These spaces are maintained by window spacers – critical components that create the precise gap between glass panes while providing a moisture-proof seal at the edges.
Spacers can be made of aluminum, stainless steel, or “warm edge” materials that reduce thermal conductivity and minimize condensation.
Each sash can operate in several modes:

Turn: The sash swings open completely like a door for maximum ventilation and easy cleaning

Tilt: The sash tilts inward from the top for secure ventilation

Micro Tilt: A minimal tilt position for subtle air exchange

Limiters can be applied where needed to restrict the opening size, providing additional safety and security, especially in homes with children or in high-rise buildings. Additionally, locks can be added to handles for enhanced safety, preventing unauthorized operation of the windows.

With two independently operable sashes, these windows offer exceptional versatility in ventilation control and functionality. The system provides sixteen distinct operational combinations, ranging from fully fixed installations where both left and right sashes remain stationary for maximum energy efficiency and security, to partially operational arrangements such as a fixed left sash with a tilt-only right sash for secure ventilation with minimal draft. More versatile configurations include combinations where one sash has tilt capability while the other opens fully like a door, allowing for balanced airflow control. The most advanced arrangement features both left and right sashes equipped with independent Tilt & Turn functionality, providing complete operational flexibility.

Function Combinations for Double Sash Windows

ADVANTAGES

Double Sash European Tilt, Tilt & Turn, or Turn Windows provide superior ventilation options compared to single sash models. With two independent sashes that can each be operated in different modes simultaneously, users have unprecedented control over airflow patterns and volume.

For example, one sash can be tilted for gentle ventilation while the other remains closed for security, or both can be fully opened for maximum air exchange.

The dual-sash design significantly enhances energy efficiency by creating multiple air barriers. When closed, these windows form exceptionally airtight seals that prevent drafts and air leakage, dramatically reducing heating and cooling costs.

The multiple chamber profiles and thermal breaks in each sash further improve insulation performance.

Security is enhanced through multi-point locking systems integrated into both sashes, making forced entry extremely difficult. Additionally, the sophisticated design includes superior sound insulation properties with the double barrier system significantly reducing noise transmission from outside.

Double Sash European Tilt, Tilt & Turn, or Turn Windows are typically constructed with durable materials like vinyl, aluminum, or wood, offering both aesthetic appeal and long-term performance.

Their innovative design adds significant value to any building while delivering superior functionality, energy efficiency, and security compared to conventional window styles.