What Are the Parts of a Front Door?

A front door may look like a simple assembly, but many elements contribute to its structure and function.

Before you start selecting a new entry door to complement your home’s exterior, learn the anatomy of a front door with this short guide.

Parts of a House’s Front Door

Parts of a House's Front Door


The slab is the entryway’s swinging face and uses different textures, colors, and materials — commonly wood, steel or fiberglass. Some door slabs have entirely flush patterns, and others incorporate raised or sunken portions of the surface, called panels.

The top, intermediate and bottom rails on each side of the slab are constructed to protect the core layers in between. You usually won’t see the insulation core that helps regulate the indoor temperature and keeps your home energy-efficient.


Windows serve as both decorative elements and a natural source of light for the home. Owners can choose entry door glass in several shapes and designs, including the “caming”, the decorative metal banding that joins the panels together. Windows are positioned inside of “lites” and can be sized during the design stage.


Hardware comes in a variety of materials and looks. Some types include the:

  • Opening mechanism: the knob or handle someone grips.
  • Hinges: the metal plate that secures the slab to the frame and lets it move.
  • Locking mechanism: either a cylinder or multi-point lock.
  • Clavos and strap hinges: rustic nail decorations used on wood or wood-look slabs.

There are also more possibilities for accessories like mail slots, door viewers and knockers.


Each entry door assembly relies on a weatherstrip around the slab to block drafts, moisture and sound. The weatherstripping seal is flexible and designed to compress between the frame when the door is shut.


The sweep is the seal at the bottom part of the entrance door. It consists of rigid materials like aluminum, stainless steel or plastic, and functions like a door’s weatherstripping to keep out the elements. Door sweeps are cut to the width of the entry before installation.

Parts of a Front Door Frame


The jambs are three parts that surround the door itself. The hinges attach to one of the two vertical side jambs. A horizontal head jamb is placed above.


A decorative window that spans the top section of the frame is called a transom. These units add beauty and increase the lighting let inside.


The door sill is a thin, usually fixed, portion of the bottom frame and is made up of wood, metal or composite. Its purpose is to redirect water away and complete the seal with the door sweep.

Browse Our Collection of New Entry Doors

As a distinguished Clopay® Master Authorized® Dealer, Quality Overhead Doors is your source in the Toledo area for distinct, beautiful entry doors. Whether you need to replace your run-down door or personalize your home’s exterior, our experts will guide you through the design process and set up a quality installation from our technicians. Request an estimate or get in touch online to start today.

Additional Resources on Entry Doors:




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