A barrier designed for exterior double doors, typically hinged, functions to minimize air and water infiltration. These barriers come in various materials like rubber, foam, metal, or vinyl, and are installed around the frame and between the door panels. A properly functioning barrier ensures a comfortable interior environment by preventing drafts, reducing energy loss, and protecting against weather damage.
Effective perimeter insulation contributes significantly to energy efficiency, lowering heating and cooling costs. By preventing outside air from entering and conditioned air from escaping, these systems maintain stable indoor temperatures. Moreover, they offer protection against moisture damage by blocking rain and snow, preserving the integrity of the doors and surrounding structure. This technology has evolved over time, from simple felt strips to sophisticated multi-layered systems that offer superior performance and durability.