Micromesh or metal gutter guards are ideal for flat roofs, as they are durable and can handle the large amounts of debris that may collect on flat surfaces. These guards ensure water flows freely, even with the potential for debris accumulation, and reduce the need for frequent cleaning.

Flat roofs are prone to collecting debris, making micromesh or metal guards the best choice for preventing clogs and ensuring proper water drainage. These guards are durable and require minimal maintenance, making them suitable for flat roofs.