singledoor

A singledoor, more commonly called a single-leaf door, is a door that comprises one door leaf. It contrasts with double doors, which have two movable panels. Single doors are used for interior rooms and many exterior entrances where space, traffic flow, or architectural style does not require a paired door. They can be flush or paneled and may include glazing such as a window panel.

Single doors are made in a range of materials. Wood doors may be solid or hollow-core; metal, fiberglass, and composite doors are also common. Exterior single doors often include weatherstripping, insulation, and sometimes a fire-resistance core. Many interior single doors are designed to be lightweight and easy to install.

Standard dimensions vary by region. In the United States, widths commonly range from 28 to 36 inches, with standard heights around 80 inches and thicknesses from 1-3/8 to 1-3/4 inches. European doors have different standard sizes. Installation requires an appropriately sized frame and proper hardware. Hinges (usually three on exterior doors) support the leaf; locks, door knobs or levers, and sometimes closers or latches control operation. Weatherseals and thresholds improve energy efficiency and protect against drafts.

Advantages of single doors include lower cost, simpler installation, and adequate access for many rooms. Disadvantages can include reduced opening width for large items and less direct control over traffic than double doors. For accessibility, the clear width around the door is an important consideration.