Exposed-fastener and concealed-clip metal systems manage attachment differently. The difference affects installation details and what must be monitored over time. A concealed attachment does not eliminate the need to inspect flashings, penetrations, and transitions.
What to do next
Ask the contractor to identify all visible and concealed attachment components in the proposed system. Review maintenance instructions and future access requirements. Compare actual assemblies, since a broad label such as metal roofing does not describe these details.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.