A storm door is a secondary exterior door installed in front of an entry door to provide added protection, ventilation, and energy efficiency. Typically made from durable materials like aluminum or steel, it shields the main door from rain, snow, and wind while helping maintain indoor temperatures. Many designs feature full view glass panels, retractable screens, and tight weather seals for visibility, airflow, and insulation. Combining function and style, storm doors enhance a home’s durability, comfort, and curb appeal year round.