Check opening for square by measuring both diagonals and they should be the same. Once you have determined the opening is square you will need to do the next two measurements:
1. Deduct 20mm off the overall width measurement (10mm per side).
2. Deduct 10mm from the height measurement.
Ensure that the opening is square by checking both diagonal measurements are the same.
Drop us a quick message with your questions at info@g2windows.com.au or give us a call and we can help you with your Steel Door measurement information.
PHONE: 0411 337 804 EMAIL: INFO@G2WINDOWS.COM.AU
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