Inspection points
- Surface and edge corrosion
- Loose or failed fasteners and washers
- Sheet laps and penetrations
- Flashings and cappings
- Damage from foot traffic or impact
- Incompatible metals or sealants
- Drainage and debris traps
Compatible sealants matter
COLORBOND guidance says quality neutral-cure sealants are suitable for coated steel and warns that some common sealants release corrosive by-products while curing.
Repair or replace a sheet?
Local fastener or flashing work may suit a sound roof. Perforation, widespread corrosion or damaged sheets may justify sheet replacement rather than repeated sealing.