How to measure windows
Taking correct measurements for new and old buildings
Before you order and install your new windows, you need to determine the correct window size. This is made simple with our handy step-by-step window measuring guide. For further information about measuring window accessories and add-ons, please refer to our window measurement guide.
What do you need?
- Pen
- Paper
- Measuring tape
- Blueprint, if necessary
Please note: With the person measuring remaining inside, both the inside and outside of the window should be measured with the dimensions noted in millimeters. Any additional window fittings, such as frame extensions or top mounted roller shutters, should also be included when measuring.