Measuring Windows Correctly – The Ultimate Checklist
When measuring windows, every millimeter counts. Measurement errors quickly lead to expensive incorrect orders and construction delays. For an error-free survey, always measure at least at three different points (left, right, middle and top, bottom, middle) and use the smallest dimension as your base.
Use the following checklist to ensure you do not miss any details during your window measurement:
- Account for plaster deduction and the required joint clearance (approx. 10-15 mm per side).
- Check the brick opening for squareness by measuring the diagonals.
- Determine the height considering the finished floor level (meter mark / benchmark).
- Document the rebate type (inner rebate, outer rebate, or flush opening).





