How to measure a replacement window?

Posted on : August 7, 2024

The measurement is taken from the external opening of the building (brick or cladding opening).

If measuring for timber to timber replacement, existing window size should work, less 10mm to height and width (this allows for any structural movement and ease of install).

When going from timber to Aluminium, if the new Aluminium window is having reveals, you will need to deduct 50mm from the height and width (this is to allow for the 20mm reveal surround and clearance for easy install) additional to the new Aluminium window you will require angled trims to cover the gap created from the edge of the aluminium and the reveals. Always consult with a professional before submitting finalised sizes.

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