Why should siding be kept 1 to 2 inches from the roof surface?

Keeping siding 1 to 2 inches from the roof surface is crucial for preventing water infiltration. This gap acts as a crucial barrier that allows for proper drainage and minimizes the risk of moisture collecting at the junction between the roof and the siding. When siding is installed too close to the roof surface, water can wick up from the roof, especially during rainfall or snowmelt, leading to potential issues such as rot, mold, and deterioration of materials. This distance helps facilitate airflow and allows water to drain away properly, protecting the structural integrity of the home and extending the lifespan of both the siding and roofing materials.

While other aspects like expansion and contraction, aesthetics, and painting might have their relevance, the primary concern in this context is the prevention of water-related damage, making it vital to maintain the specified distance between siding and the roof surface.