An astragal, specifically designed for double door systems, is a vertical molding applied to the meeting edge of one door in a pair. This component, available at home improvement retailers, including a major chain with locations nationwide, plays a critical role in sealing the gap between the two doors. It effectively prevents the passage of light, air, and water when the doors are closed. A common example includes a split astragal, where one half is attached to each door, creating a tight seal upon closure.
The implementation of this sealing component offers multiple advantages. It contributes to improved energy efficiency by minimizing drafts and heat loss, leading to potential cost savings on heating and cooling expenses. Furthermore, it enhances security by providing a more robust barrier against forced entry, as it reinforces the weakest point of a double door system. Historically, such architectural elements have been used to enhance both the functionality and aesthetic appeal of doorways, evolving from simple strips of wood to more complex, weather-resistant designs.
