• Fasteners and washers: Check for loose or missing screws, damaged washers, and movement around fixing points.
• Seams and overlaps: Inspect panel laps, joints, and closures for gaps or failed sealant.
• Flashings and wall junctions: Check parapet edges, roof-to-wall transitions, and penetrations for continuous weather protection.
• Corrosion and coating damage: Look for rust, scratches, and deteriorated finishes, especially at cut edges or areas where water remains.
• Drainage: Remove debris and confirm water can reach gutters and outlets without ponding.

Typical response: Trace the leak path, repair or replace defective fasteners and flashings, reseal compatible joints, and replace badly deteriorated panels when patching is no longer reliable.