A barrier designed for installation along the edges of a specific type of exterior door protects against drafts, moisture, and insects. These barriers are typically made of materials like rubber, vinyl, felt, or foam, and are available in various shapes and sizes to fit different door frames. A properly installed barrier creates a tight seal between the door and its frame when closed.
Effective barriers offer significant advantages, contributing to lower energy bills by reducing air leakage, minimizing outside noise infiltration, and preventing water damage that can lead to costly repairs. Historically, simpler materials like felt or putty were used, but modern advancements in material science have led to more durable and efficient options. This evolution reflects a growing understanding of building science principles and the importance of energy efficiency.