How to Measure For a Window or Door

When getting a new Crystal window or door it is important that your measurements are correct to ensure you get the right size of window.

  1. For accurate measurements, you need to measure the opening outside on both the height and width. Do not measure the old frame or door, it has to be the exact brickwork opening.
  2. Measure brick to brick – in at least 3 different places, then deduct 10mm from the final height and width measurements. This will give you a 5mm fitting allowance for t...
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