unsafe: in the inspector’s opinion, a condition of an area, system, component or procedure that is judged to be a significant risk of injury during normal, day-to-day use. The risk may be due to damage, deterioration, improper installation, or a change in accepted commercial construction standards.

Use and Occupancy: Classifications established by the IBC® that are the design loads for categorized structures based on usage in pounds per square foot.

UV (ultraviolet) degradation: A reduction in performance caused by exposure to sunlight.