Window stays are hardware accessories used to support windows and keep them in an open state. They are typically installed between the window frame and sash, serving the functions of fixing, limiting positions, and bearing weight. They not only allow windows to maintain a ventilated angle but also enhance the stability and safety of windows to a certain extent.
I. Main Characteristics of Window Stays
- Diverse Materials
Common materials include stainless steel, aluminum alloy, and iron, which are corrosion-resistant, high-strength, and long-lasting, adapting to different window types and usage environments. - Flexible Structure
Generally composed of a fixed end (connected to the window frame) and a movable end (connected to the sash), they achieve opening and closing actions through joints or sliding rails, allowing the window opening angle to be adjusted as needed. - Practical Functions
① Positioning Support: Fixes the window’s open position to prevent shaking due to wind or external forces.
② Opening Limitation: Controls the maximum opening amplitude of the window to avoid children climbing and falling or damage caused by excessive window opening.
③ Ventilation Assistance: Maintains a stable ventilation state while reducing wear and tear on window hardware.
II. Common Types of Window Stays
| Type | Characteristics | Application Scenarios |
| Side-Hung Window Stay | Used for side-hung windows, supporting the sash through a linkage structure, forming a horizontal state when opened, with a large ventilation area. | Residential homes, office side-hung windows |
| Top-Hung Window Stay | The sash opens upward, making it difficult for rain to enter during ventilation, with high safety, suitable for high windows or anti-theft scenarios. | Bathrooms, kitchen high windows, high-rise residences |
| Bottom-Hung Window Stay | The sash opens downward with a small opening angle, mainly used for specially designed windows (such as inverted windows). | Special architectural designs, shaped windows |
| Sliding Stay (Four-Bar Linkage) | Composed of multiple linkages, with smooth sliding, strong load-bearing capacity, and hidden installation for good aesthetics. | Insulated aluminum windows, premium system windows |
| Telescopic Window Stay | Can adjust length through telescoping, adapting to different opening angles, with a simple structure and easy installation. | Simple windows, temporary ventilation needs |
III. Functions of Window Stays
- Safety Protection
Limit the opening range of windows to reduce the risk of children falling accidentally. At the same time, it can reduce window shaking in severe weather such as typhoons and enhance wind resistance. - Window Protection
Evenly distributes the weight of the sash to avoid deformation or damage to hardware caused by long-term uneven force, extending the window’s service life. - Flexible Ventilation
Adjusts the window’s opening angle as needed to control the ventilation volume while maintaining indoor privacy (e.g., small opening angles make it difficult to observe the interior from the outside).
IV. How to Choose Window Stays?
- Based on Window Type
① Choose side-hung or sliding stays for side-hung windows;
② Choose top-hung stays for top-hung windows;
③ Sliding windows generally do not require window stays (some designs may need auxiliary limit accessories). - Pay Attention to Load-Bearing Capacity
The load-bearing capacity of window stays should match the weight of the sash. For heavy windows (such as large-size glass), it is recommended to choose sliding stays made of stainless steel or thickened aluminum alloy. - Consider the Usage Environment
In coastal areas or high-humidity environments, prioritize corrosion-resistant stainless steel materials; high-rise residences are advised to select window stays with a locking function to enhance safety. - Note the Installation Method
Divided into surface-mounted and hidden (concealed) installations. Hidden window stays are more aesthetically pleasing but require high installation precision and need to be pre-matched with the window frame design.
V. Conclusion
Window stays are important components of window hardware systems. Although they may seem insignificant，they significantly impact the safety, practicality, and service life of windows. When selecting them, it is necessary to comprehensively consider the window type, usage needs, and material performance to ensure their functions are maximized.