Common Definitions and Terms

Trim Width

The Trim Width is raw frame dimensions from one stud to the other.
To calculate the trim width, use the above table in reverse (e.g. Door Width +60mm)

Trim Height

The Trim Height is the measurement from the raw floor to the underside of the stud.

Floor Clearance

The floor clearance of a door is the distance (in mm) between the bottom of the door and the floor. A floor clearance is required to ensure the door can still close with floor materials added, and to make sure the gap between the door and floor minimises drafts, sound pollution, temperature differences, and more. Pre-Hung doors purchased online have a standard floor clearance of 25mm. Please Contact Us if you require a smaller or larger floor clearance.


Architrave is a strip of material that rounds off the gib and the door, hiding the joint between the two. Although it is not technically required, it adds an important finishing touch to your rooms.

Pre-Hung Doors

Our doors are Pre-Hung, meaning they arrive to your site in the frames with the hinges attached, ready to be slotted into the opening straight away.
Instead of having to purchase the door leaf, jamb, hardware, and machining the door yourself, leave it to us
. This can save a huge amount of manual labour you would usually get charged by a builder to do.

Walkunder Height

When the door has been installed and the flooring has been laid, the walkunder height can be measured. To measure the walkunder height, measure from the the bottom of the finished floor to the top of the Jamb.

Walkthrough Area

When the door has been completed, the walkthrough area can be measured by measuring the width between the door opening. This is the area you “walk-through”

Door Jamb

The door jamb is the part of the door frame that acts as the “legs” of the door. The hinges are fixed to one side of the door, while the striker is used on the other forming the vertical positions of the door frame. There are a variety of jamb options available to you to select from, each with different benefits.

Door Hanging

It will be frustrating to order a door only to find that the hinges are on the wrong side when it arrives. The terms “left-hung” and “right-hung” may be confusing but it is an important concept to get right as it cannot be changed once the door has been assembled.

To figure out whether your door is left or right hung, when the door is closed stand on the side where you can see the hinges. If the hinges are on the Left, it is Left Hung. If the Hinges are on the Right, it is Right Hung.

If you don’t have an existing door to work off, choosing the right handing for your door is still important. For example, if there is a wall next to your door, that is generally the best place to put your hinges as the door will open against the wall, leaving more space in your room.

If you need help determining the handing of your door, please Get in Touch and one of our team will be happy to help.

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