When measuring for vinyl replacement windows, first measure the width at three points: the top, middle, and bottom of the window opening. Next, measure the height at the left, center, and right sides. Take the smallest measurements for width and height, and measure both inside and outside dimensions to ensure the window will fit properly.

Measuring for vinyl replacement windows involves precision, taking multiple measurements for width and height. Vinyl windows are custom-fit, so ensuring accurate measurements is critical to achieving energy efficiency and preventing gaps that allow drafts. Professional installers often double-check these measurements to ensure a snug fit.