Which of the following should NOT be done when installing the rail of a garage door opener?

The correct answer indicates that passing the rail of a garage door opener through the wall finish should not be done. This is important because the rail must be securely attached to solid framing to ensure it can withstand the forces and stresses experienced during the operation of the garage door. If the rail were to pass through the wall finish without proper support, it would compromise the stability and functionality of the garage door system.

Moreover, ensuring that the rail is properly leveled and securely fastened is crucial for the overall operation and safety of the garage door. A level installation ensures smooth operation, while a firm secure installation minimizes the risk of the rail becoming loose over time, which could lead to malfunction or even accidents. Therefore, proper installation practices include attachment to solid framing, leveling, and securing the rail firmly, while avoiding any installation practices that could weaken the structural integrity, such as passing it through the wall finish.