Red Seal Glazier Practice Exam

How is the square footage of a window calculated?

1. Length multiplied by height

2. Width divided by height

3. Height multiplied by width

4. Length plus width

The correct answer is: Height multiplied by width

The square footage of a window is determined by multiplying its height by its width. This calculation provides the area in square feet, which is essential for understanding the amount of material needed for installation, the glazing area for energy efficiency calculations, and for determining costs associated with the window. When measuring windows, it’s standard practice to take the height from the top of the frame to the bottom, and the width from one side of the frame to the other. Both measurements should be in feet to ensure that the area is calculated in square feet. Other methods of calculation mentioned do not produce a correct assessment of square footage. For example, simply adding the length and width does not yield an area, and dividing the width by height does not provide relevant information about the window's size.