Cold Room Door Offset - What is it?

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What Is a Coldroom Door Offset? (Simple Guide for Selecting the Right Hardware)

If you're replacing a coldroom door handle, hinge, or gasket, you will almost always come across the term “offset.”
It’s one of the most important measurements when choosing the correct hardware — but it’s often misunderstood.

Here’s a clear breakdown to help you identify the right offset for your coldroom door.

1. Door Offset (Overall Door Thickness)

The door offset refers to the total thickness of the door, including the gasket/door seal.
For example:

  • Door thickness: 100mm

  • Gasket thickness: 20mm

  • Door Offset = 120mm

This measurement affects which handles, hinges, and strike plates will fit correctly.

Different Door Types & Their Typical Offsets

  • Foster / Williams recessed doors
    These are partially recessed and usually have a smaller offset (40–60mm).

  • Fully overlapping coldroom doors
    These typically have a larger offset (80–120mm).

  • Fully recessed / flush doors
    These have no offset because the door surface sits flush with the frame.

How to Measure Your Door Offset

Close the door and measure from the front face of the door frame to the outermost edge of the door.
This gives you the correct offset value.

In the diagram, this is marked as measurement “D.”

Coldroom door offset drawing

2. Gasket Offset

The gasket offset refers to the gap between the door’s inner face and the coldroom frame.

Because gaskets can become compressed over time, you’ll get the most accurate reading by measuring on the hinge side — the area least likely to have sagged or distorted.

This measurement helps us recommend the correct gasket profile or a compatible replacement.

3. Hinge Offset

The hinge offset is the distance from the frame or panel where the hinge is mounted to the centre line of the hinge pin where it connects to the door.

This measurement ensures the replacement hinge will:

  • Sit in the correct position

  • Close properly

  • Pull the door tight into the gasket

  • Avoid misalignment or air leakage

Knowing your hinge offset also helps us match your door to the correct Fermod, Kason, or compatible hinge model.

Need Help Identifying Your Offset?

If you’re unsure, simply send us:

  • A photo of the door (closed)

  • A close-up of the hinge

  • Your measurements

We’ll identify the correct offset and recommend the right hardware.

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