Maximizing Sealing Performance in Aluminum Doors and Windows: The Role of Hardware

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When it comes to aluminum doors and windows, the hardware used plays a crucial role in determining their sealing performance. In this article, we delve into the various types of door and window hardware and how they affect the airtightness of aluminum structures. Understanding these factors is essential for architects, builders, and homeowners looking to ensure energy efficiency and comfort in their buildings.

Types of Door and Window Hardware

Multi-locking Point Hardware

Multi-locking point hardware is designed with lock points distributed around the entire door and window frame. When locked, these points create a strong sealing compression force, integrating the sash and frame and providing superior airtightness. In aluminum applications, the use of multi-locking point hardware can greatly enhance sealing performance, offering benefits such as improved energy efficiency and sound insulation.

Single-locking Point Hardware

In contrast, single-locking point hardware provides only limited sealing performance. With just a single locking point, these systems leave corners of the door or window unconstrained, leading to gaps that compromise airtightness. For aluminum doors and windows, opting for single-locking point hardware may result in reduced energy efficiency and increased noise infiltration.

Locking Point Arrangement and Sealing Performance

The arrangement of locking points on the handle side of doors and windows significantly impacts sealing performance. Through analysis of different scenarios, it’s evident that increasing the number of locking points, up to a certain threshold, can minimize deformation and improve sealing. Balancing strength and sealing requirements is crucial to determine the optimal locking point arrangement for aluminum structures.

Effects of Hinges on Sealing Performance

Hinges, commonly used in doors and windows, often require cutting off sealing tape at their positions. However, this seemingly minor adjustment can have significant implications for sealing performance. The gap penetration caused by hinges can compromise energy efficiency, yet it’s a factor often overlooked. Awareness of this issue is essential for mitigating its impact and ensuring optimal sealing in aluminum door and window applications.


In conclusion, the choice of door and window hardware is paramount in maximizing sealing performance in aluminum structures. Whether opting for multi-locking point systems or considering the impact of hinges, every decision influences the overall airtightness of the building. By prioritizing sealing performance and making informed hardware choices, architects, builders, and homeowners can achieve superior energy efficiency and comfort in their aluminum door and window projects.

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