Inspect the roof for rust, loose fasteners, gaps, and damaged panels
Clean the roof surface thoroughly to remove dirt, debris, oil, and old sealant
Remove rust with a wire brush or grinder and treat affected areas with rust inhibitor
Replace damaged panels, flashing, and fasteners
Tighten or replace loose screws and use screws with neoprene washers
Seal seams, overlaps, fasteners, and penetrations with metal roofing sealant
Apply butyl tape at panel laps and flashing joints
Install or repair flashing around vents, chimneys, skylights, and edges
Use a high-quality metal roof coating or elastomeric waterproof membrane
Apply primer if required by the coating manufacturer
Coat the roof evenly according to product instructions and recommended thickness
Recoat areas with heavy wear, exposed fasteners, and joints as needed
Ensure proper slope and drainage to prevent standing water
Clear gutters, downspouts, and drains regularly
Check the roof periodically for new leaks, cracks, and seal failures
Reapply sealant and coating as part of routine maintenance