What are Door Jambs?


It’s hard to appreciate the intricacies of a doorframe until you take a closer look. Most of us refer to all the elements as the ‘frame’, but there are various components to the frame, including door jambs, which you may have overlooked until now.

A door jamb refers to the vertical interior sides of the door frame that hold the hinges on one side, and the strike plate and recess for the latch on the other.

Door jambs are often referred to as the door ‘legs’. The size and strength of the door jambs are determined by the width of your walls, the weight of the door, and may vary depending on whether it’s being used for an interior or exterior door.

What do door jambs do?

Door jambs are significant because they hold the weight of the door on the mounting hinges and determine the integrity of the locking system, which is why it’s so essential to pay close attention when renovating or installing brand new door jambs as part of the door frame.


Painting a door jamb

The door should sit flush against the jambs, without leaving any gaps for draughts to blow through and to ensure the functionality of the door and the locking system.

Door jambs which are not correctly measured or fitted can cause a door to annoyingly ‘stick’ when opening, or to not fully close and latch after being pushed shut. The performance of the door, therefore ‘hinges’ on the door jamb (pardon the pun).


Wooden door jamb and door

What is the difference between a door jamb and a door frame?

The door jamb refers to just one part of the door frame. A door frame is made up of the following elements:

  • Head – sits horizontally along the top of the doorframe
  • Sill/Threshold – lies horizontally along the ground beneath the door
  • Lining/Casing – hides any gaps between the frame and the wall
  • Door Stop – prevents the door from swinging in both directions
  • Weatherstripping – creates a seal around the door to prevent air from seeping through
  • Architrave – a decorative mounding that encases the entire door frame
  • Jamb – the vertical flat surface on the interior of the frame where the hinges and strike plate are mounted to

Door Jambs from Australian Moulding & Door Company:

Door jambs are traditionally made from wood, but can also be made from Medium Density Fiberboard (MDF). The selection of your chosen material may depend on the period of your home, the make of the door, and the current mouldings to ensure a consistency of style and look throughout your home.

The Australian Moulding Company offers a choice of either pre-primed or raw MDF, as well as finger jointed or clear pine, Kiln Dried Hard Wood, American Oak, Western Red Cedar, and Meranti. We offer other varieties of timber with some restrictions, so feel free to contact us at 1300 761 838, get a quote here, or see our contact page to ask for more details if you have a specific wood for your door jamb in mind.