- 1). MEASURE THE WIDTH. Use a measuring tape to measure the width between the inside jambs at the top, middle, and bottom of the window. If the measurements differ use the smallest measurement.
- 2). MEASURE THE HEIGHT. Use a measuring tape to measure the height between the top of the window stool and the bottom of the head jamb. Take three measurements: far left, center, and far right. Use the smallest measurement.
- 3). When requesting a quote or ordering new replacement windows, specify the WIDTH first, then the HEIGHT (Width X Height).
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