Which statement most accurately describes architectural metal roofing assemblies?

The statement that architectural metal roofing assemblies require continuous or closely spaced decking is accurate because these types of roofing systems are designed to be installed onto a stable and secure substrate. Continuous or closely spaced decking helps to provide necessary support and stability for the metal panels, ensuring they are properly aligned and can effectively shed water. This structural integrity is crucial to prevent any potential movement or warping of the metal under different environmental conditions, which could lead to leaks or other issues over time.

While the other statements may contain some elements of truth, they do not accurately reflect the essential characteristics of architectural metal roofing assemblies. For instance, while it's beneficial for metal roofing to have close decking for support, stating that it can be installed over any type of roof deck overlooks the requirement for adequate support. In addition, insulation needs can vary based on climate and building codes, which makes the assertion regarding insulation too broad. Lastly, implying that these roofing systems are only suited for commercial buildings ignores their applicability in residential settings as well. Therefore, the emphasis on the structural support provided by continuous or closely spaced decking accurately captures a critical aspect of architectural metal roofing assemblies.