Patio doors are large doors that connect indoor living spaces to outdoor areas, such as patios or decks. They are typically made of glass, allowing natural light to enter the home while providing a view of the outside. Common types of patio doors include sliding doors and French doors, which can enhance the aesthetic appeal of a home. These doors are designed for easy access to outdoor spaces, making them popular for entertaining and relaxation. Many patio doors come with energy-efficient features, such as double glazing, to help maintain indoor temperatures. They can also include security features to protect against unauthorized entry.