The component situated atop the garage door opening, acting as a barrier against external elements, typically consists of a flexible material designed to compress against the door when closed. This element effectively bridges the gap between the structural framework and the door itself, mitigating air infiltration and water penetration. For example, a deteriorated or improperly installed section can lead to noticeable drafts and potential water damage inside the garage.
Its primary function is to enhance energy efficiency by minimizing heat loss or gain, contributing to a more stable temperature within the garage. Furthermore, this protective measure prevents water from seeping into the structure, safeguarding against potential rot, mold growth, and associated structural damage. Historically, simpler versions using basic materials were employed, but modern iterations utilize advanced polymers for improved durability and performance.