What serves to protect walls and foundations from roof water runoff?

Gutters play a crucial role in protecting walls and foundations from roof water runoff by collecting and redirecting rainwater that falls from the roof. When it rains, water cascades off the roof and can lead to potential issues such as soil erosion, foundation damage, and water infiltration into walls if not properly managed.

The primary function of gutters is to channel this water away from the building's base, reducing the risk of water pooling around the foundation. This diversion is vital for maintaining the structural integrity of the building and preventing moisture-related problems, such as mold growth or deterioration of the building materials.

While drainage systems can also manage water runoff and protect structures, their function is broader and often involves managing groundwater and surface water beyond just the roof runoff. Siding is primarily for aesthetic and weatherproofing purposes, serving as a protective layer on the exterior walls but not specifically designed to handle roof runoff. Downspouts, while essential components of the gutter system that channel water from gutters to the ground or drainage systems, do not independently protect walls or foundations. Instead, they work in conjunction with gutters to facilitate effective runoff management. Therefore, gutters are the primary mechanism by which walls and foundations are safeguarded against water from the roof.