What is the minimum length for gutter splash blocks?

The minimum length for gutter splash blocks is established to ensure proper drainage away from a building's foundation. A length of 3 feet is appropriate as it effectively directs water runoff from the gutters away from the base of the structure, thereby reducing the risk of water saturation around the foundation, which can lead to structural issues, erosion, or other moisture-related problems.

Using splash blocks that are shorter may not sufficiently divert water, increasing the likelihood of pooling near the foundation. Consequently, 3 feet is the standard often recommended to provide adequate distance for effective drainage, meeting the necessary performance standards for protecting a building in various environmental conditions.