The answer to 'how to maintain roof' is to regularly inspect, clean, and repair your roof to ensure it remains in good condition. This includes checking for missing, damaged, or loose shingles, clearing debris from gutters and downspouts, and addressing any leaks or other issues promptly.
It's recommended to inspect your roof at least twice a year, in the spring and fall, to identify and address any problems before they worsen. You should also clean your gutters and downspouts regularly, typically in the spring and fall, to prevent clogs and water damage. If you notice any issues, such as leaks or damaged shingles, it's important to address them right away to prevent further deterioration.