Planning · 6 min

How to Measure Windows for Replacement

A phone estimate is not an order size. These steps give you a rough width and height so a conversation can start. The person who will install it still has to measure before anything is ordered.

What you'll learn

  • Which of the three widths you write down, and why the smallest one matters
  • How an insert measurement differs from measuring the wall opening
  • What a crooked opening looks like when the two diagonals disagree
  • Why your numbers are for the conversation, not for the factory order

Step by step

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Safety note

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