Your Preferred Showroom

  • Pella Windows & Doors of Centerville1600 Falmouth Rd. Centerville, MA 02632Showroom Details

Other Showrooms Near You

A Quick Guide: Parts of a Door

POSTED ON in Global Blogs

A guide to know the parts of a doorIf you want to make a major impact, replacing your door is one of the simplest things you can do. It's an easy way to upgrade your home, but before you tackle the project, it's a good idea to learn the lingo of the door business. Let's take a look at all the different parts of a door, and how they all come together. When you're more familiar with door part names, it's easier to talk to contractors and dealers, and choose the right door for your project.

Door part names

Door frame

The door frame is the entire framework supporting the door, including the sill, jamb and head. This is also known as a door sash. Door frames can be made of wood or aluminum, and are made to blend seamlessly with your home.


The door sill is the very bottom part of the door frame that rests on the floor.

Jamb/door jam

The two door jambs are the sides of the door frame that run vertically.


The head is the top piece of the door frame, running horizontally.


The panel is the term for the door itself. This is the part that swings open and closed.


If you have a pair of doors in your entry, the astragal is the vertical piece that runs between them, from the sill to the head.

Fixed panel

This is the panel of the door in a pair of doors that does not open or close.

Door sweep

A sweep is a piece of weather stripping at the bottom of the door that is weather resistant and forms a seal between the door sill and the door frame. Door sweeps increase the energy efficiency of your home.


A threshold is the transition from the door sill to the floor of the room. A threshold is a decorative element that can be simple or elaborate, depending on your style.


The transom is the horizontal beam that separates the door from the fanlight or window above it.

Strike plate

The strike plate is placed on the door jamb where the hole for the bolt of the door and the bolt meet. It is a small metal plate that is screwed to the door jamb.


Sidelights are fixed glass panels attached to both or either side of the door, outside the frame. These tall narrow windows allow more light into the home.

In-swing or out-swing

This refers to whether a door swings into the room or out of the room when opened.

The Difference: Inswing vs. Outswing Doors

Door knobs and hardware


The door knob is the round mechanism used to open and close the door. Door knobs come in an amazing variety of materials, such as antique brass, rubbed bronze, or satin nickel.


The hinge is the jointed device that pivots the door panel. There are different types of door hinges used on doors including barrel hinges, pivot hinges, and concealed hinges.

Foot bolt

This is a type of lock that is installed at the bottom of the door and is operated with your foot.

Key lock

There are an incredible amount of choices when it comes to entry door locks. Two types are the cylinder lock, which moves the bolt by rotating a cylinder, and the multi-point lock, which has several locking points but only one handle.

Getting to know door part descriptions is a great way to start your new door project. For a visual of where these door parts appear, view this door parts infographic. Your doors have a big impact on every day of your life, and replacing them will enhance your curb appeal, save energy, and increase the value of your home.

  Call Now
  • Energy Star Partner logo
  • AAMA logo
  • Pella Limited Lifetime Warranty logo
  • Property Brothers Buying + Selling logo
  • better business bureau logo