Materials applied directly to walls or ceilings must not become detached at what temperature?

The correct temperature for materials applied directly to walls or ceilings to remain attached is 200°F. This standard ensures that components, such as insulation, drywall, or other finishing materials, maintain their structural integrity and adhesion under varying temperature conditions. At temperatures above 200°F, materials may begin to lose their effectiveness or detach, leading to potential safety hazards or structural issues.

Materials used in commercial buildings must be capable of withstanding specific temperature limits to avoid failure that could compromise the building's safety and performance. This threshold is crucial because high temperatures can result from factors like fire exposure or equipment malfunctions, which must be taken into consideration during building inspections and adherence to building codes.