Inspect for Leaks: Look for signs of water damage inside the building, like stains on ceilings or walls. On the roof, check for rust spots, loose or missing screws, and gaps around seams, flashings, or penetrations (like vents and chimneys). Check for Rust: Inspect the roof for rust or corrosion, especially in areas where water tends to accumulate. Rust can weaken the metal, leading to leaks.
Examine Fasteners and Panels: Look for loose or missing fasteners (screws or nails) and inspect metal panels for warping, denting, or separation at the seams.

Use Proper Equipment: Ensure you have a sturdy ladder and wear non-slip shoes. Metal roofs can be slippery, especially when wet.
Avoid Walking on Panels: If possible, minimize walking on the roof to avoid damaging the panels. When necessary, walk on the flat parts of the panels, near the screws, for better support.

A. Fixing Leaks and Sealing:
Seal Small Holes and Gaps: For small holes or gaps, use a high-quality, metal-compatible roofing sealant. Apply the sealant generously over the hole, ensuring it covers the area completely.
Patch Larger Holes: For larger holes or damaged areas, cut a piece of metal patching material (same type as the roof) slightly larger than the hole. Apply a roofing adhesive around the hole, place the patch over it, and secure it with screws. Seal the edges with roofing sealant.
Seam Repairs: If seams between metal panels are separating, apply butyl tape or metal roof sealant along the seam. Press the panels together firmly and secure with screws if necessary.
B. Repairing Rust:
Remove Rust: Use a wire brush or grinder to remove rust from the affected area. Clean the area thoroughly afterward to remove any debris.
Apply a Rust Inhibitor: Once the rust is removed, apply a rust-inhibiting primer to the bare metal. This will prevent further corrosion.
Paint Over the Area: After the primer dries, apply a coat of metal roof paint that matches the rest of the roof. This helps protect the metal and maintain the roof’s appearance.
C. Replacing Fasteners:
Tighten Loose Fasteners: If screws or nails are loose, tighten them carefully. Be sure not to overtighten, as this can damage the metal panels.
Replace Missing or Damaged Fasteners: Use screws with rubber washers to replace missing or damaged fasteners. The washers help seal the holes and prevent leaks.

Regular Inspections: Check the roof regularly, especially after storms or severe weather, to catch and address any issues early.
Clean the Roof: Keep the roof clean by removing debris, leaves, and dirt. This prevents moisture buildup and reduces the risk of rust.
Maintain Gutters and Downspouts: Ensure gutters and downspouts are clean and functioning properly to prevent water from pooling on the roof.

Hire a Specialist: For extensive damage, or if the roof is steep or difficult to access, consider hiring a professional roofer with experience in metal roofing. They can handle repairs safely and ensure the roof remains watertight and secure.
Summary: Metal roofs are durable and can last for decades, but they do require occasional maintenance and repairs. Addressing issues like leaks, rust, and loose fasteners promptly can extend the life of your metal roof and keep it in good condition.