In which building component is lead most commonly found?

Lead is most commonly found in windows and doors, particularly in older buildings constructed before the lead paint ban in 1978. In these areas, lead can often be present in the form of lead-based paint, which was used for its durability and moisture-resistant properties. Since windows and doors frequently undergo wear and tear due to their moving parts or exposure to the elements, lead paint can deteriorate and create lead dust or chips, posing a health risk.

While lead can also be present in other building components such as floors, ceilings, walls, roofs, and electrical wiring, the prevalence and accessibility of lead in windows and doors, along with the fact that these areas are frequently disturbed during renovation or repair work, make them a key focus for lead inspection and hazard mitigation. This context helps clarify why windows and doors are often highlighted as the component with the most significant lead presence.