The answer to 'how to maintain metal roof' is to regularly inspect, clean, and protect your metal roof. Metal roofs are durable and long-lasting, but they do require some maintenance to keep them in top condition and prevent issues like leaks, rust, or damage.
Start by inspecting your metal roof at least once or twice a year, looking for any signs of wear, damage, or debris buildup. Clean the roof by gently brushing away dirt, leaves, and other debris. You can also use a mild detergent and soft-bristle brush to remove stubborn grime. Be careful not to use abrasive cleaners that could scratch the metal surface. After cleaning, apply a protective coating or sealant to help prevent corrosion and weathering. This should be done every 3-5 years, or as recommended by the manufacturer.