Which of the following is not one of the four steps to apply to wall covering materials before installation?

• A. Inspecting the material.
• B. Sanding the surface.
• C. Acclimating the material.
• D. Measuring the material.

Answer: (B)

Preparing wall coverings for installation centers on how the wallpaper material itself behaves and is handled before it goes up. Inspecting the material helps you catch any defects that would show up after it’s hung. Acclimating the material allows it to adjust to the room’s temperature and humidity, reducing warping or shrinkage after installation. Measuring the material ensures you have enough length and helps plan the layout and pattern matches for a clean, efficient install. Sanding the surface isn’t a prep step for the wallpaper package itself; it’s a surface treatment aimed at the wall, not the wallpaper, and can damage the wallpaper backing or interfere with adhesion. So sanding isn’t part of the standard pre-install preparation for applying wall coverings.