What is an astragal?

An astragal is a decorative molding used to cover the gap where two doors meet when closed. It is usually placed on the edge of one door and serves as a buffer to prevent damage to the door and frame when they come into contact. Astragals can be made from a variety of materials such as wood, metal, or composite materials. They can be simple and plain or intricately carved with decorative patterns. Astragals are commonly used in interior and exterior doors to provide a finished and polished look to the door set.