To measure windows, take the width measurement at three points: the top, middle, and bottom. Then measure the height from the sill to the top at the left, center, and right. Always use the smallest of these measurements to ensure the window will fit properly. This method works for both replacement and new window installations.

Measuring windows properly is critical for achieving a snug fit. Multiple measurements prevent errors and ensure that the window will fit perfectly into the opening. Accurate measurements also help avoid costly mistakes and maximize energy efficiency by preventing gaps that let air and moisture into your home.