A storm door is an exterior door designed to protect the main entry door from harsh weather conditions. It is typically made of durable materials like aluminum or fiberglass and features a glass or screen panel. Storm doors help improve energy efficiency by providing an extra layer of insulation, reducing drafts, and keeping out moisture. These doors can also enhance the appearance of a home while allowing natural light to enter. Many storm doors come with adjustable screens, enabling homeowners to enjoy fresh air during mild weather. They are often installed in front of the main door for added security and protection against the elements.