Doors consist of several parts: the door leaf, its frame and jamb, hardware such as hinges and knobs or levers, latches and deadbolts, a strike plate, and a bottom threshold with weatherstripping and trim. This article explains these terms and how they fit together on most doors.
Core door components
Structure of the door itself
This list covers the physical components that make up the door and its immediate frame.
- Door leaf or door slab: the actual swinging panel.
- Door panel, rails, and stiles: the inserted sections and the surrounding framework of a panel door.
- Door frame and jamb: the fixed skeleton that the door fits into.
- Head and threshold/sill: the top and bottom parts of the frame; the threshold sits at the bottom of exterior doors and helps seal against drafts.
- Door stop: a molding around the frame that the door contacts when closed.
Concluding: These elements determine the door’s size, style, and basic motion, before any hardware is added.
Hardware and fittings
Operate and secure the door
Before listing hardware, note that this set covers the mechanisms and trim that let you open, close, and lock the door.
- Hinges: pivots that attach the door to the frame and allow it to swing.
- Door knob or lever handle: the user interface to operate the latch.
- Latch bolt: the spring-loaded bolt that holds the door closed when the knob/lever is used.
- Deadbolt: a second, typically key-controlled bolt for added security—often required on exterior doors.
- Strike plate: the metal plate on the frame that the latch or deadbolt slides into.
- Lockset: the combination of latch, bolt, handle, and key mechanism that forms the locking system.
- Escutcheon: decorative plates around the handle or lock.
- Cylinder or keyway: the core that accepts a key to operate the lock.
Concluding: Hardware terms cover how the door is opened, shut, secured, and finished aesthetically with plates and trim.
Seals, trims, and add-ons
Weather and appearance matters
These elements influence weather resistance, safety, and the door’s look and feel in daily use.
- Weatherstripping: seals around the edges to keep out drafts and moisture.
- Threshold: bottom piece that helps seal and separate interior from exterior; may be combined with a sill.
- Kick plate: protective plate at the bottom of the door to guard against scuffs and damage.
- Astragal: vertical strip between two leaves of a double door to weatherproof and provide a seal.
- Peephole or door viewer: a small window to see who is outside.
- Door closer: a device that automatically returns the door to a closed position.
- Door trim or casing: decorative molding around the door frame.
Concluding: These features affect energy efficiency, security, and the door’s finishing aesthetics.
Summary
Understanding door terminology helps homeowners, renters, and professionals discuss installation, repair, and upgrades with clarity. From the door leaf and frame to hinges, latches, and weatherseals, each part plays a specific role in function, security, and appearance.