Triple-Sash Window
Triple-sash windows are an excellent choice for anyone seeking a stylish yet practical window solution. These windows feature two fixed vertical dividers-known as mullions-that separate the structure into three operable sashes. Each sash can be opened and tilted, offering easy operation and maximum functionality.
Key features of triple-sash windows:
- Compatible with all OKNOPLAST profile systems
- Expanded opening potential with three operable sashes
- Available in all OKNOPLAST color options
- Ideal for use with flat window treatments above sliding units
Triple-sash windows combine versatility, efficiency, and a clean, symmetrical appearance, making them well-suited for both traditional and modern interiors.

Triple-Sash Window
Triple-sash windows are a great choice for those looking for a stylish and functional window solution. Featuring two fixed vertical dividers-known as mullions-these windows include three sashes that can both open and tilt, ensuring easy operation and maximum versatility.
Each of the three window sashes can be opened and tilted independently.
Key benefits of triple-sash windows:
- Compatible with all OKNOPLAST profile systems
- Greater opening flexibility with three operable sashes
- Available in the full range of OKNOPLAST colors
- Perfect for use with flat valances above sliding components
Triple-sash windows provide an elegant and highly practical option for a wide range of interior designs.

Opening Options for Added Comfort
Oknoplast’s triple-sash windows offer various opening configurations-whether bottom-to-top or top-to-bottom-to meet your individual needs and preferences.
Versatile Applications
All Oknoplast uPVC windows can be configured as triple-sash units, showcasing the versatility and adaptability of our product line.
Discover Oknoplast’s triple-sash windows and experience the perfect combination of style, functionality, and unmatched quality.
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