When estimating wallpaper, what must be considered?

When estimating wallpaper, it is essential to consider window openings when calculating square footage. This aspect significantly impacts the total wall area that needs to be covered with wallpaper. Windows occupy space on the walls, and without accounting for them, one would overestimate the amount of wallpaper needed. Subtracting the area of windows from the total wall area helps ensure that the calculation for the number of wallpaper rolls required is accurate and efficient.

The correct approach to estimating wallpaper goes beyond just measuring the walls. While factors like the size of wall panels, the number of rolls required, and the pattern repeat of the wallpaper are important considerations in their own right, they do not directly address the need to adjust the total square footage of wall space to account for any openings. Therefore, overlooking window openings can lead to purchasing more wallpaper than necessary, resulting in excess cost and waste.