Final answer:
Most cleaning procedures for structures will begin at the bottom and finish at the top. By starting from the bottom and working upwards, the cleaning process ensures that each level is thoroughly cleaned before reaching the top. This prevents dirt and debris from falling onto lower levels and ensures a systematic cleaning process.
Step-by-step explanation:
Most cleaning procedures for structures will begin at the bottom and finish at the top.
When cleaning structures such as buildings, it is important to start from the lower levels and work upwards. This is because cleaning from the top down would result in dirt, debris, and cleaning solutions falling onto lower levels and potentially causing damage or requiring re-cleaning. By starting at the bottom and progressively moving upwards, one can ensure that each level is thoroughly cleaned before reaching the top.
For example, when cleaning the exterior of a tall building, the lower levels may be power-washed or scrubbed first, followed by the higher levels. This allows dirt and grime to be washed away and prevents it from accumulating on lower surfaces. The final step would be cleaning the roof or any other topmost surfaces.