How far should the inside edge of a gutter lining be above the outside edge for proper drainage?

For proper drainage in a gutter system, it is critical that the inside edge of the gutter lining is positioned at a height above the outside edge. Having the inside edge elevated by 2 inches allows for adequate water flow and ensures that rainwater can effectively travel toward the drain. This height accommodates the gravitational pull necessary to channel water, especially during heavy rainfall, preventing overflow and potential structural damage.

The 2-inch height provides a balance; it is high enough to enable effective drainage while also low enough to prevent water from pooling or creating excessive pressure within the gutter system. This design consideration is essential for maintaining the longevity and efficiency of the gutter's function, as well as protecting the surrounding structure from water-related issues.