The Standard Door Thickness in Australia is...

Category : Door Hardware
Date : 31/07/2018

The standard door thickness in Australia is....

Mmm what is it?

Depending on where you buy your doors from, you will find the thickness of a door varies. I can't find reference to the standard door thickness requirement however there are off the rack standard door sizes, but even these can vary. Doors that fall outside of the 'standard' range (or not on the rack) are considered to be non-standard, and will either require custom framing and hanging, or will need to be modified to fit the space.

In Australia the most common standard door size/width is 2040 x 820mm, but there are other sizes that are popularly used.

         2040 x520; x620; x720; x770; x820; x870; and x920.

However the thickness of the doors can and does vary. Ignoring 'standard' thickness because I can't find a standard, lets look at what you can buy of the rack. Door thickness' off the rack vary from supplier and manufacturer across the board. The overall size of a door you will find on most door supply racks, however the thickness of those doors will vary. From as thin as 25mm, growing to 32mm, 33mm, 35mm, 38mm, 40mm and 45mm.


Regardless of the size of the door, the Australian Standard AS 1428.1 (Design for access and mobility, Part 1: General requirements for access) recommends that the height of the handle should fall within 900mm and 1100mm above the floor. This is around waist height for the average adult. Generally speaking, only much older doors or those installed for a special purpose will deviate from this recommendation.


You will find some door suppliers stating that the standard door thickness is 35 or 40mm while others will tell you its 33mm depending on what they have on their racks. The bottom line is door thickness does vary. Maybe back at the industrial revolution when machines took over and they could machine a door to 35mm or 40mm thickness it became the off the rack standard. But now days when there are so many imports and suppliers the 'standard' off the rack door thickness has varied.


So, does it matter how thick your door is? When the door is closed how thick does it look? A closed door looks... flat. An open door is something you walk through and close behind you. When its closed it looks... flat.


The issue you will find is that manufacturers of door hardware are left in a quandry. There are numerous door thickness' and only so many fixing bolts they can supply to go through the thickness of a door.


So the manufacture in their wisdom supply longer tie through bolts so that they can be cut down to size. If they were to supply several sizes with each door handle the price of the handle would increase. And for the sake of a hacksaw blade, you can cut back when necessary. Why, even Lockwood state door thickness to be anywhere from 32mm to 50mm as standard for there door levers.


Unfortunately the thickness of doors is uncontrolable. Recently we were faced with a door that was cladded to the point it reached 170mm thickness. When it was closed, it looked....flat.   


  • DESIGNER doorware
  • Gainsborough
  • Ingersoll Rand
  • KABA
  • madinoz
  • Pittella
  • Bellevue Imports