Which dimension is typically stated first when describing a window's size?

Which dimension is typically stated first when describing a window's size?

• A. height
• B. width
• C. rough opening size
• D. trim

Answer: (B)

Width is typically stated first when describing a window’s size because the standard notation is width by height (W × H). The horizontal measurement sets the width of the opening the window must fit, which is the primary constraint for planning the rough opening and framing. The height comes after as the vertical dimension. For example, a window described as 36 inches wide by 48 inches tall indicates a 36-inch-wide opening and a 48-inch tall one. Rough opening size is a separate installation-related measurement, and trim refers to the finished decorative molding, not a size order.

Width is typically stated first when describing a window’s size because the standard notation is width by height (W × H). The horizontal measurement sets the width of the opening the window must fit, which is the primary constraint for planning the rough opening and framing. The height comes after as the vertical dimension. For example, a window described as 36 inches wide by 48 inches tall indicates a 36-inch-wide opening and a 48-inch tall one. Rough opening size is a separate installation-related measurement, and trim refers to the finished decorative molding, not a size order.